The PrintGrip failed us on our 12C press. It was great for the first 2-3 days then we got less and less out of it, even with cleaning it and scrubbing it well. After 2 weeks we called it quits and plan on using spreadable water based / spray tack as needed (fleece).
I think it would be great in lower production shops / on manual presses but doesn't last long enough to justify itself. Maybe that Saati cleaner works better than what we were doing but it seemed like new after our cleanings but was only lasting about 400 shirts until needed the cleaning again. It started at lasting for 1000 shirts though.