Just to share my experience,since I have work with few aftermarket ecu out there(motec,microtech,adaptronic,freedom,haltech,pfc,ecuflash)..in most cases,give any of those ecu a good tuner,and your car will be good,but sometimes we need to look at the ecu architecture,coz every ecu is built differently even though it can perform the same thing.(Some of u know I do sell haltech and do tuning),but I'll give my honest opinion.
Adaptronic is one good example of a good ecu,its cheap and very well equipped,I like it but I wish the software can be more graphical and not too technical..no need to mention motec and haltech,they are long time in the business,they should be good,the new line of haltech is as good as some motec if not their highest end ecu...As my experience with microtech,I agree with TE27,it is more suitable for track use,the system is simple with few i/o..but they are well known for producing good power and response.
For everyday driving refinement,can't go wrong with japanese ecu,good idle,drivability and economy,and they do give good power output too,mainly because they are plug and play,and the base map is already there.other wire in ecu,we need to spend a lot of time tuning the drivability.
So,almost all ecu is good,but not all ecu made the same,and the biggest factor is the tuning..er,that's for now :-)
