Love 'em - especially for going through tons of footage. Contour Shuttle is nice and simple. I did finally cave and get the Euphonix MC Transport - which I believe is now avid. It never said it could work with Premiere or AE but it works great and the feel is very different from the Contour - it's a nice heavy, smooth rolling feel. But I'd say go for contour first and see if you like using it. Supah cheap so you can't go wrong.
In ae I'd say it's more limited since scrubbing isn't really scrubbing without rendering - But for editing those things are very nice indeed.