Pros: The mouse has been updated since my original one which just wore out over time. The new M310 now works on recycled white tables which are made out of white recycled plastics. For a long long time the old M310 would not track on these tables and the new one this one does. Keeps the mouse pads off my work area.

Cons: None

Other Thoughts: I ended up getting this much later due to moving in and forgetting to change my address. There just isn't a lot of control when you are dealing with third party people selling through newegg. Something to think about anyway.

Pros: Works Everytime without any problems & I have them on every PC that I own & my clients own. No problems.

Cons: None

Pros: Works OK. No problems with most functions.

Cons: Goes to sleep in a nanosecond. Intermittently have to move is several times to wake it up. I didn't want Bluetooth because of this issue, now I have it with this RF mouse.

Other Thoughts: I avoided Logitech because they wouldn't support some products beyond three years, thought I would try them again. I will probably wait another 10 years.

Pros: -Great build quality.
-Months of battery life.
-No drivers required.
-Tiny receiver.

Cons: -Not necessarily the greatest range.

Other Thoughts: I've been using and selling these to clients for years and I love them. They're fantastic value for money and very well built. Aside from having a bit shorter range than some may like, these are top shelf.

Pros: This mouse feels good in the hand and does what it should.

Cons: No problems that I can find

Pros: Good function, ergonomic size

Cons: Doesn't feel as sturdy as a pricier model

Pros: pricey, but works great and LASTS

Cons: none.

Pros: Battery life! Wow! This is on an HTPC that gets daily use. I put a AA battery in it the day i got it 10/2012 and left the power swtich ON the whole time. it's now 02/2015 and the battery just now ran out. The advertised battery life is 12mo/1 year. If this mouse were on my main PC being used constantly for production then I could see the battery life being significantly shorter. Either way over 2 years of always-on operation on a single AA battery is darn good no matter how you cut it. The yearly cost of that is negligible.

Tracks well on most surfaces. Keyword is 'most'

Very light.

Size is small but not REALLY small. It fits the hand well enough for daily operation.

Micro RF receiver fits anywhere and does a pretty good job with range. I started losing resolution noticeably around the 23-foot mark with direct line of sight. That's pretty far.

Survived multiple instances of being soaked in beer. This can kill most mice/keyboards immediately, this one survived me any my drunken friends multiple times. Clicks are still crisp, wheel still smooth. I'm more surprised about this than the battery life, honestly.

Cons: No Fwd/Back buttons on the side like the 510 model. Replaced this with the 510 just because of this.

Doesn't track well on glossy surfaces. Hardly a con since so many mice are the same and aren't expected to operate on a glossy surface anyway.

Other Thoughts: Get this.

Pros: seems well built

Cons: The image above suggests this is a normal size mouse, compared to the smaller one in the left hand. However this mouse is smaller than most. In addition to that, the contours of this mouse cause my fingers to rub together. I will be giving/throwing this away and buying another.

Pros: Fits great in the palm of my hand.

Cons: The battery life on this mouse is horrible. I have to replace the battery every few days. I would be happy if it lasted a few weeks, but every few days is quite unacceptable, especially considering they advertise a battery life of 1.5 years.