I have ones from checkcorp b/c they got good reviews from a CEGer who has them since the old GB.
easy to install, although w/ cloth seats it was a bit of a bother... but it's very nice and warm now
I went w/ basic kit, as my butt is not sensitive enough to require anything more sophisticated. In reality I have them on for several minutes and then switch off as they are no longer needed. basic kit is about $90, next level is whooping $150
I mean come on!
this is more expensive than in times of the group buy, but I enjoy every cent of this modification.
