Q2death,
Cam and a half does require some attention to the "tuning" or timing marks. I have been shooting a darton maverick with CPS for about 5 years. The strings and cables required some adjustments a couple times per year, and i found that the CPS cam system to be far less critical with regards to "timing" than traditional two cam systems. The point of impact and aiming charachteistics will stay the same as long as you stay pairly close to the tuning marks. With a two cam bow, I was timing the wheels about once per week, and the point of impact and aiming characteristics change dramatically with minor(as little as one twist)changes in cable length.
I have never owned a onecam, but i do have a hoyt with a spiral cam, and a regular hoyt one cam. I havent shot either bow enough to give an informed opinion, but i think that the regular hoyt cam and a half will behave similarly to the darton system I have used based on the draw characteristics. Both cams have a "hole" valley. The characteristics of the "hole" do not change with minor changes in wheel timing. The spiral cams' valley characteristics do change a bit with minor changes in the cables, but not as much as a two cam bow. I do not know, however if the spiral cam will shoot consistantly if slightly out of "tune".
The only way to tell what I or anyone else thinks of the cam and a half's is to see what they are shooting at vegas this winter. I will be interested to see how many 898, 899, and 900's will be shot with the cam and a half as compared to other bows.