I've got the electric one from CT and I love it.
Besides the fact that it's a bit heavy and big, there's not much to complain about: it gets the job done and has lots of torque. I've used a battery powered one a few times at work (Dewalt 18.8V) and found it works fine as long as the battery is fully charged, after that that is looses torque really quick. I used to go through at least 2 battery packs (sometimes 3) just to change a set of tires, witch doesn't really makes it worth much IMHO.
The one at CT goes on sale 2 or 3 times a year @ half price... so if you're not in a hurry I'd say wait and keep an eye on your CT flyer! :icon_wink: