I was fortunate enough to get my hands on a C-16 Driver. Currently using a 915D2 and used to swing a 975D. The C16 seems to take the best of both and up it a bunch. Fantastic sound, feel and control right out of the box. Definitely an impressive club and wonderful addition to my bag. I understand that this club is the basis for the 917d. If that's the case the 917 should be a great club as well.