PID control Q-seris PLC from Mitsubishi

Hello all,
I need some feedback for Mitsu’s PID algorithm for the Q-processor, how hard was it to set up, did it behave as expected, what happen when you made setpoint changes, and so on. I have used the PID function in the FX’s and it was very difficult to set and did not control very well. I may use a Q on our next job but before I do I wanted to get some feedback. The PID would be used for several flow control valves, one PID function per valve, estimate three valves. Thank you in advance for the help.

The Q series PID is easy to use, I use all the Mitsi range with the PID function. I've always had good control although the FX and A1s is hard to tune.
Most manual can be found here. The PID one is there too.
http://www.mitsubishi-automation.com/

thanks for he response GD, all this worry about what to use and the project was sownsized from big and complicated to small and easy. What exatcly do you mean by Mitsi range?