It really comes down to your understanding of the fundementals, if you can't performance tune a carby car don't expect it to be easier because you are now using a laptop or handcontroller. What you will do is blow the engine up in no time, its amazing how many people can't hear detonation??
Also Motec is supposed to be hard to do well, as an example a large number of the V8 supercar teams employ the same 3rd party tuner to do their engines. SBR AFAIK
does their own tuning but only because their guy used to work for Motec.
Microtech is very basic to tune but this crudness shows up as minimal load points, shit cold start, and average closed loop operation (stuff that doesn't affect rotary operation). But on a race car these work fine becaue WOT is virtually the same on all ecu's, you fly thru the load points very quickly and it comes down to the tuner.