I have had several failures getting the A320 off the ground successfully. First off I am struggling to get the throttles to calibrate well on my Bravo quadrant. It is hard to gauge where to put it for the various settings - climb, flex take off, reverse max and reverse idle, etc. I have to guestimate where to set the throttles as there are no click points on the quadrant so it is pure luck if I get it right. Secondly, once I have taken off, I have not been able to get the plane to react to the autopilot/flight plan or restricted speed constraints. The plane just wildly and erratically decides to keep accelerating way beyond speed limits I have put in the flight computer. It also fails to follow the flight plan, even though I can see that these are shown on the PFD. I must be doing something wrong but, at the moment, I have given up on using this version of the A320