They run about $90/set for chrome, so yea, you could call them really expensive. I had them on the Tele I made that has a Bigsby on it. I HATED using them in combination with the Bigsby, so I traded them out for some traditional tuners and used the Steinbergers on this one.
They have their own little nuances you need to get used to. After that, I think they're great. I totally disagree with Dean about them being difficult during setup. They're extremely accurate (42:1 IIRC), so setting the intonation was a LOT easier than with regular tuners.
The body is 1 1/2" thick, +/- 11 1/2" at the widest points, and +/- 17" from the tip of the pocket to the bottom. The overall length is 35". No info on weight, but it's really light... almost as light as my Steinberger. If you think it needs a custom case, feel free to get sewing!