The putter is "designed" for more control on your putts, which means you hit it perfect or the ball is pushed/pulled feet off your aim point (READ: yes I'm pissed at the putting). Let's just say I've been using the 150 ft scale a LOT just to reduce the speed of the meter around the contact point to try and hit everything perfect (just on putts over 30 ft). Still doesn't seem to help, since I had a 4 footer get "moved" a whole cup width off my aim point just due to the deviations. I hit the damn thing perfect and it started off course.
Slowly but surely, I am getting more and more in awe of tibbets, Avatar, et al. I really think I could practice night and day for a month and I'd still want to throw my laptop across the room 3 or 4 times a round on BP just because of deviations screwing with perfect shots. I don't know how they do it, especially since I notice the largest deviations (and seems to be most frequent) during putting.