I got the IT and it is the best thing ever.. I haven't had a perfectly fitting thumb hole in forever cause I am super picky about my thumb hole and there was no way I would be able to get them exaclty the same on all of my balls.. so I just went with a round drill and tape.. with the it I can make the thumb exactly the way I want and move it from ball to ball.. I also would stand behind the quality and construction of the IT 100% ..
--------------------
16-17 mph,350 rpm,PAP 5 1/2 x 3/8up, HighGame 300 x 3, High Series 782
Book Average 215 / 205,PBA Xperience ave180