I have been using TheGRIP system for over six months. I have found it to be pretty damned comfortable, even at high weights (considering I don't wrap the electrical tape too hard.) The most annoying thing for me is that the hour-glass sheaths can get fucked up after a while from you pealing the electrical tape off after a hanging session. The best part about the system is that with the Economy package you can do anything. There is no need to buy any other package than the Economy package, as it's easy to emulate their extras for really cheap or even free. I wear the system literally all day and night and the only time my blood gets cut off is when I wrap too hard while hanging or wrap the velcro strap + cock ring around my
ADS too tight. Even so, it takes 5 seconds to fix so it's not a problem. Two of the sheaths that I use right now for the
ADS (one g-flex sleeve and one weight-attachment sleeve) have tears at the bottom of them, but I can still use them with the velcro strap (which I have to put a jelly cockring over now because the velcro wears out over time.