Pros: First, this stand vs all other stands..
1. The DoubleSight stand family is all interchangeble you can turn a double into a triple or a quad by buying a few cheap parts. We use them in our office we have these stands all over the place in all sorts of configurations. So the ability to reconfigure them with nothing more than a hex wrench is a big plus.
2. The stands have alot of range of motion. We've played with cheaper hp/dell stands but the rigidness of them feels unsettling. Most stands pivot the whole base- the doublesights have (2) knuckles per monitor and you'll be surprised how often you make minor changes to the monitor, reaching for a speaker know, pen or just moving it a little to see who you are talking too. Range of motion is a big plus and I think is pretty exclusive to the doublesight line.

Cons: These stands have always cost about the same and they are just about enough that you could buy a nicer monitor or a stand. It's a difficult choice but I've had the stands for 8 years and they 8 year old and the one I bought from newegg look exactly the same.

Other Thoughts: These hold up really well so check [censored]bay/craigs[censored] for bargain.

Pros: Very flexible horizontally, plus tilt and 90 degree swivel capability.
Sturdy and well made.
The stackable extension for monitors 3 and 4 plugs in the top.
It is easy to set up. VESA.

Cons: TOO SHORT!

At max height my 22 in monitors are still lower than the OEM stands they came on.

Double sight sells an expensive 3 inch height extender that should come included.

At the max out of the box height, you will not save any desktop space.

Other Thoughts: Please Double Sight - do like other firms and disclose max desktop to center of mount height on the box!

Or include the 3 inch vertical extender in the box

Pros: Easy installation. quite massive and stable. LOVE IT. Can rotate the monitors. easy positioning.

Cons: only once I was doing something goofy and got it tipped over with my two heavy massive monitors. But you really have to try to get to get it unstable.

Pros: Great, sturdy. I added the additional two monitors on top. Over love it.

Cons: I had a problem getting the two brackets to line up when I added the DS-22T. Took a bit of work.
When using 24 inch monitors, you can't really rotate into portrait mode. Maybe if it was fixed into portrait, but not on a whim. There isnt enough clearance to do the change easily.

Pros: Looks Great
Makes A lot More Room On My Desk
Fully adjustable (left, Right, Up, Down)
Well Built
Good Price

Cons: none

Other Thoughts: You can add on to it latter to if you wish rather then buying a new stand that holds 4, And that will save you well over $100.00!

Pros: Easy to set up (comes completely assembled), lots of flexibility in monitor position/viewing angles/rotation/etc., with dual 22" inch monitors never feels unstable at all. Haven't tried this, but I chose these stands for work because they are apparently expandable up to four (maybe even six?) monitors with accessories. The top of the post looks like it has the ability to put on another monitor mount, so it might be possible to have three portrait monitors on the stand at once.

Cons: Not great for shallow desks - when the monitors are positioned close to each other the arms protrude out behind the stand, so you can't push it up against a wall very closely. I have to keep about 8" of separation between my two portrait monitors on my desk to keep a reasonable viewing distance, but then my desk is pretty shallow.

Other Thoughts: Got a dozen of these for mounting dual 22" monitors (not from newegg, work has procurement contract with another vendor), most people have one landscape and one portrait orientation and are happy with them. I'm considering buying one from newegg for home use.

Pros: None

Cons: This thing is a peice of junk. It's bent on edges and does not hold the monitors well - they do not sit evenly and cannot be adjusted to do so either. Also it does not adjust high enough to be of any use.

Other Thoughts: New Eggs's replacement only policy is bad on this. There was no way to see how it would actually look or work til you buy it and then they will not take it back. I am very dissatisfied with New Egg and the stand.

Pros: Well constructed. Substantial weight & footprint for stability. Simple setup. Easy adjustments.

Cons: Seems a little wobbly when adjusting the up/down angle or position, but not so much that it will tip over. Adjusting from landscape to portrait doesn't seem to have nearly so much effect.

Other Thoughts: No independent height adjustments for each monitor, but not really a big deal. Would have been nice though as I generally only tilt one monitor and the other one ends up a little high. I do a lot of work going back and forth from landscape to portrait mode, so this looks like it will work well for me. Better than leaning the monitor against the wall, anyhow. A good buy if you want to tilt either or both of you monitors periodically. Single monitors need not apply.