JohnAppllo:
well, I rented the R11 Irons in exchange for my current Rocket Ballz L10 and honestly I can't say that I was that more impressed.
Of course I am still learning and using starter balls but I do the same with my Rockets so I thought it was a fair comparison.
Maybe they did bite a bit more, but not sure it would be worth the 2000 credits.
Can't say if they are worth it to you or not but stopping power is the property to go for in irons, to test you need to be using balls that have spin property at lest equal to the clubs.
Overal there are maybe 2 holes on every course where backspin will be nessesary to stay on the green. The stroke advantage, well thats up to you, lol
Good Luck and have Fun