It was over 5 years ago I built the MS2, I know they have brought more out and its getting cleverer and harder to build yourself. For a N/A simple car like the BMW E30 I have its more than adequate. My main reason for going down the MS2 route was cost. Its dirt cheap and a great way to get into ECU builds and mapping. The great thing about MS2 is there is an awful lot of it about its totally open source with a great backup. The realtime output screen of the engine parameters is really useful and well laid out.