Pros: Feels great to stand. I'm 6'4" and it's tall enough for me. Easy to lift and lower my two monitors. Keyboard fits. Mousepad is big enough for me.

Cons: Take a little to figure out the adjustment screws so it works with your monitors. Can't fit any monitors over about 23 or 24 inches.

Other Thoughts: It's expensive, but solidly built and works perfectly. I am comfortable working sitting or standing now.

Pros: Best product on the market for the money. It is also one of only a few units that will fit on an existing work station. To be able to sit and stand at your desk usually requires a hand crank or electric device or desk. This thing is balanced to the weight of your monitor, keyboard and mouse and raises and lowers with the touch of a finger. No cranking or electricity required. I know I sound like I work for the company but I have been working in the field of office ergonomics for fifteen years and built some of my own equipment. This thing rocks.

Cons: With the mouse tray extended, the keyboard tray feels a little tippy. It's the only problem I have with it. The rest of it is built like a brick (a beautiful brick) but for some reason they under built the keyboard tray.

Other Thoughts: One coment I read, said it was too expensive. Compared to what? If you compare it to the other alternatives on the market it is very cheap. Price an electric, variable height desk.

Pros: * It's designed by a medical equipment company, and the quality level shows, as does the price. But it works as advertised, and is functional and sleek. If you understand the concept of paying more for more, you can rest assured that you do get what you pay for with this.
* To raise/lower the entire contraption takes only slight pressure on the silver arm - somehow they've calculated a neutral tension point (which can be modified if needed, but I haven't, works fine at the default setting for me). No knobs or screws or detentes or notches or switches. Ingenious.
* You can also raise/lower the monitors separately from the keyboard part, as well. I'm 6'0" and I've got the total height of the unit at less than maximum, so it can raise quite a bit, probably good enough for a 6'5" person, if I had to guess (depending on desk height). Lowest level is also lower than I need by several inches, so the range is quite wide (dependent on chair height, of course).

Cons: * Mouse pad is too small. No way around it. They need to design a bigger mouse pad.

(I did not have enough space for my complete review here; if you want read all of it, you can read it at 'the site named after the largest river in brazil', under screen name 'oroboros777', then buy it here)

Other Thoughts: * With this dual monitor version, max combined HORIZONTAL (not diagonal screen size) monitor widths truly is 44 inches. It can be 21 + 23, but it can't add up to more than 44. I have 21" and 23" horizontal width monitors attached and it's right at the limit. Can't even put in the safety screws at the ends of the arms. A more perfect set up would be to have identical monitors, or at least the same horizontal monitor widths, being as thin, depth wise, as possible. Even so, my deeper four year old monitors work great. Barely, total width wise, but great. If you've got a bigger monitor still, then you'll need to buy the single monitor HD version, instead.
* If you use reference materials a lot and have them at desk height, they will not rise with you, unlike with an adjustable desk. Ergotron sells an additional book / iPhone / iPad type holder thing that attaches to the central silver arm, but this obviously will only help you with one such item.