Yes, I've used Strike, Turbo and Energy; all in full beds at 50 lbs (as well as some other tensions and hybrids with Turbo and Energy). Strike on its own is a not as soft as the other two, but still on the softer spectrum of copolys. It is a nice string with better tension maintenance than the other two, better control but not a 'big spin' string. It has a unique surface, but probably not enough to cause any difference to ball contact; I didn't notice any wild spin-ability or 'ball bite'. It had a greasy-like coating on it, so I tried it with Gut mains as well. That was a nice combo. Easier spin production, and great flat control with gut mains. Strike in a full bed to me felt like a soft version of BBO. Good all-round poly, but without one single defining characteristic: average feel, spin & power; good to very good control. I do have a Turbo/Strike hybrid on my short list to try out soon. Strike/Energy would also be an interesting one too.