When I bought my iMac with a 27" display it stood to high causing you to strain your neck. This product was the perfect answer. The display seats a inch or two lower now which makes all the difference.
The unit is very solidly built. Has a definite feel of quality, and would seem well up to the weight of any monitor. Unfortunately, you must drill holes through your desk to install it, as there is no clamp mount available for it. This ended up being a deal breaker for me, but if you are willing to do it -- and need something that swivels easily -- it's a good product. In the end, however, I'm going with a (much simpler) product by Lindy, instead.