G Bar rear coil over suspension

I think the Heidts looks better and it cheaper

http://cgi.ebay.com/ebaymotors/ws/e...RK:MEWA:IT&viewitem=&item=200070246271&rd=1,1

I would like to know the answer to this too as I am considering it for my 68 Fastback. It is basically a tri-angulated 4 bar, the same as Air Ride Tech uses with their air ride setup, but with coilovers. It will have some bind built into it by design, but it probably wont be a problem except in extreme situations.
The other option I am looking at is EvM's new tri-link setup that will be released soon. Probably a better design for all out performance, but at over twice the price, with all the options, I am not sure if the benefits outweigh the drawbacks to the G-bar setup.
Anybody with any thought's on this?
David.