SDR,
Like you I bought mine used and it does what I need it to do. I don't know that more accuracy would change the way I use it even though it is call an ACCU-cycle.

I haven't seen anyone put a meter on any of the other high end cyclers to see if they are doing exactly what they are supposed to do.

Hobbico isn't high quality stuff but at the right price it may do enough to get the job done.