I can't comment on the s9-1 driver. I did pick up the s9-1 F 3 wood. I like it so far, but I haven't much more than a driving range session and a round of 18 holes with it. It is more accurate than my Callaway X right now.
Still too soon to tell.
WitB 2010:
Dr: Titleist 907 D1, YS 6+ s flex
3W: Cobra S9-1 F, , Aldila DVS HL s flex
2H: Callaway Heavenwood 17 degree
3i-pw Titleist 690 CBs, True Temper s300
gw: Cleveland CG12 52 degree
sw: Cleveland CG12 58 degree
Putter: Ping Anser G2i
Ball: Srixon Z Star/Bridgestone B330S
Other clubs:
Dr: Callaway FT 5, Aldilia DVS s-flex
5W: Cleveland Launcher Fuji E270 s flex
3i - pw Mizuno MP 29, (planning to reshaft at some point).
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