Pros: -Starters its logitech, they are the best \review
-Bluetooth and USB "dongle" options for connecting
-3 different device selection
- Free Spin mode
- Awesome (seriously!)

Cons: Free spin mode uses a button now where the search button was on the MX revo. I like the old layout but it took 2-3 days and i already forgot they moved the layout around.

Other Thoughts: Replaced the MX revolution I bought in 2006. The MX Revo was still kicking after nearly 10 years but it was time to get a new one.

If you have never used a premium Logitech mouse, you have not lived :)

BUY THIS YOU WILL LOVE IT!!!!!!!!!!!

Pros: fits hand well, love new scrawling wheel as it spins free for fast browsing and then clicks, kind of like a fishing reel.

Cons: back and forth buttons need work

Other Thoughts: nice battery life before recharges. did not purchase here but at that photo place in north east, wait for sales

Pros: This mouse feels fantastic. The left/right buttons are a nice, smooth plastic that feels good but not cheap, the palm rest has a wonderful rubberized coating that feels soft and keeps your hand from just sliding around, the thumb rest has the same rubberized coating and a wonderful ridged shape that you can spend all day just stroking, the buttons work with a gentle yet solid click, the scroll wheel lovingly grips your finger without harsh and unwelcome edges.... This mouse just feels right!

Cons: I've not run across anything I'd consider a con yet, but...

Other Thoughts: The mouse is on the heavy side. If you tend to pick your mouse up a lot, this might not be the one for you.

If you're coming from another marathon mouse that has side thumb buttons, the placement of these will take a little getting used to, as they're stacked on top of each other because of the side scroll wheel. The arrangement feels a bit off at first, but after a day or two it starts to feel normal. If you're someone who floats between mice, this might keep you from ever feeling fully at ease though.

Pros: Build Quality
Bluetooth connection

Cons: Side wheel without ratchet, extremely inaccurate
Gesture button, gimmick - needs a lot of force to press it properly
Side button recessed, unhandy
Questionable supperior over old Revolution
Wheel doesn't tilt
Forget about battery life 40days or so
Needs plenty of space on desk
Not a traveler companion
Doesn't work with Mac
Died after 4 months of average use.
When you use wheel on max speed sometimes the page is shaking up and down for no reason.
Price.

Other Thoughts: Died, Logitech refused me to do replacement because I bought my mice beeing on travel. Cheap interior compnents caused "brick situation" internal logic error. Because outside quality means higher than average prices and worse than average components...

The way You are eager to lost the buisness is just fascinating in some ways, You should learn a lot from Corsair or EVGA in terms of customer service and respecting customer rights in terms of warranty.

Pros: Fits hand good

Cons: battery does not last 30 or 40 days only goes 1 to 2 weeks using about 5 hours a day.

Other Thoughts: but the battery does longer that my old g700s

Pros: Looks more like the 1100 which was my favorite.

Cons: Price at A__zon is about $87. I'm not quite sure how price match works. Do you provide proof upfront before purchase or get reimbursed after?

Other Thoughts: I'm surprised the price is actually higher than A__zon. Usually Newegg is the lowest with an occasional exception from Tiger Direct. Can't print competitors name? Give me a break!

Pros: This thing is AWESOME!

Cons: NONE!

Other Thoughts: Was skeptical in Logitech besting their Performance MX Mouse but they have with functionality design and comfort!

Pros: The mouse feels great in my hand, very easy to get use to. Once you have it, its hard to go back to a small mouse. It also have nice programmable features.

Cons: This mouse did not last 4 weeks on a charge it lasted 3 weeks to the day. I use this mouse for at least 8 hours a day 6 days week at work. But I am sysadmin so i use my mouse all the time. I still consider this mouse to have great battery life, but no as long at they say.

Other Thoughts: If you are up in the air about spending $100 dollars on a mouse I would not buy it then. But if you have the disposable income, I would recommend this mouse.

Pros: None..

Cons: The mouse i received has got very obvious signs of wear.
Counting 3x deep, ~1" long scratches around where the palm of your hand would sit. And 1x deep, circular pattern scratch ~1/2" diameter, under where your index finger knuckle would be.

Other Thoughts: I got this mouse delivered from "New"egg this morning 9th October.
When i took it out of the box i noticed the packaging was nothing special. I saw the mouse and the first thing i noticed were these scratches. I inspected them with my eye balls and knew they would not be easily repaired.
This 1 star review is only because the item visibly looked like it has seen long term use by a cactus.
This 1 star review has nothing to do with how the mouse functioned because i will not use it.
I have since phoned Newegg customer support and they agreed to process the return which is good.
I am not entirely sure what has caused the wear marks; Newegg said the item must have had been damaged during shipping or when it was being made. I cannot figure out how the circle scratch could happen during regular use, but the rest of the mouse looks like a worn out demo model perhaps. The usb input to the mouse looks like it has seen some action, and the 4x rubber pads on the bottom of the mouse also look like it has been rubbed against sandpaper.
I'm not sure i can tell people "this is a terrible mouse don't buy it", because judging by other reviews my situation is likely bad luck and will probably not happen to everyone, but this is the bad experience i've had which i'd like to share. I honestly have not had a lot of good experiences with Logitech products. Recently I had a dud $80 keyboard go out after 1 week of use, and a $500 speaker system stop working after 6 months, and now this. But many other people claim they're a good brand. It's hard to keep quiet and keep forking over cash when i think basic issues of quality are present.

Pros: Feels great in your hand. The scroll wheel is amazing. It has a horizontal scroll, forward, back and gesture controls. Great tracking and giant skates. The left and right mouse buttons are separated, unlike the m560. This way you never left and right click at the same time. I had this problem with the m560.

Cons: none yet

Other Thoughts: This is the quality I use to always expect from Logitech. This is a relatively expensive mouse, but you can feel the quality, unlike many of their cheaper mice. I wrote a terrible review of the M560. I am glad I gave Logitech another chance