Excerpt: I use it mostly in sketch up pro & it's really worth of the high price if you make 3d as a pro. Previously I had some problems with my regular 5 button mouse during zooming & the work was not so smooth like now. I tried it also with autocad 2009 for 2d purposes & it works very good, as well. I tested the stuff with google earth, but I wasn't impressed. Anyway it's pricey product so I recommend to buy it only for business.
Summary: I've been using this for just over a month now (I avoided writing a review before now to avoid "New Toy Syndrome"). I bought it to replace my dying Space Navigator. That served for more than 5 years of abuse and neglect without issue. The SpaceMouse Pro is a worthy addition to the 3dConnexion line up and, depending on what you plan to use it for, worth adding to your kit list.