The GTX outlets do not have nearly the same grip as a hospital grade receptacle, but the difference in sound is night and day. The increased grip of hospital grade is not really a good thing as it'll strip the plating off of male plugs. The GTX is designed specifically NOT to damage plated male AC plugs. The GTX also uses copper contacts, which are too soft to hold it's shape, so a stainless steel spring is used to compensate. They could have made this spring as stiff as they wanted, so I assume the retention force is very intentionally calibrated.
The cover is ridiculous, stainless steel with a coating of carbon fiber all around it, and the wall plate is very thick powdercoated billet aluminum. While expensive they hugely overbuilt and are definitely worthwhile.
Also, the Furutech AC receptacle promotion is still on, here are some prices, not including the new NCF which are $250:
GTX-D(R) - $183.75
GTX-D(G) - $140.00
Cover - $83.25
Wall Plate - $120.00
If you get them from me, shipping and burn-in are free. Burn-in on the rhodium plated receptacles will drive you nuts, it takes a long time and has a huge effect on the sound.