Yep, they are all that and a bag of chips IMHO. I bought 2 from eBay. Both 2003's. Yes old indeed. However, they both worked fine. They have 9 buttons that as stated are "document sensitive". So you reall get 27 buttons depending on how you set the device up. As stated you will need a day or 2 to "train the mind" to use both hands. However, after you get over that hill I suspect you will wonder how you ever got by w/o one. I managed to get both of mine for $30.00 each. From eBay. These things go way beyond just being able to rotate and select at the same time. I.E. you can: rotate, pan, zoom AND select at the same time. As well as move parts in asm's on the control of the spaceball. Also is my favorite, you can grab something and drag with the mouse AND move with the spaceball. How many times have you had to click and drag something to some place not visible on the screen (due to zoom or whatever)? I can grab something and while holding the item to drag can pan/zoom the model as needed. W/o spaceball you would have to possibly, gab drag to edge of screen then zoom out, and do it all over again. ACK!! This feature alone makes it very worthwhile IMHO. This situation happens a lot when sketching in/on large models. Working in one area and suddenly you need to drag something to the other side of the model. PITA! w/o spaceball/mouse. After I had mine set up. I got to the point where I only use the keyboard to enter numbers.
Regards,
Sean F
seanf@newing-halll.com
There is 1 to many l's in the email. Fix to respond.