Speaking from experience, the old Hitec analogs and some of the digitals did not center well and you would wind up chasing the plane around instead of concentrating on the task at hand. Now having said that, some of the newer digitals are much better and actully do function well. You certainly get what you pay for in the case of servos it would seem.

If those servos are what you can get then don't let that stop you from coming out and playing. You can always get better servos down the road if they are less than pecise. By the time you are getting ready for the Masters Finals you'll have a preference anyway.