Cressy, I have used these multiple times on Saxo/106 Supercharger conversions and whilst they are "crude"(easy to setup in my opinion) they were pretty reliable for me.

If you have ever seen the Saxo v's M3 video on Youtube we built the car as a demo and it was mapped with an MF2 and 2 extra injectors, with another unit to fool the stock ECU and it ran for 15k miles with over 220bhp at wheels, done multiple 160mph runs(on long ratio box) and too many to count 140mph runs(short box) and believe me the owner ABUSED the car. His first charger gave up after 2 weeks when he done 25 miles on motorway at 135mph which was around 7000rpm so charger was spinning at over 110000rpm hahaha The other cars we done weren't treated any better.

So if you have everything else working and just need the extra fuel I would say go for it. Obviously an EFi system would be better but it should at the cost.

You set the map points by turning 6-7 pots on the board and they go from 2000rpm-8000rpm if I remember right, it then fills in the rest of the range itself. We mapped with narrow band but had it checked on rollers normally too. With wideband you would be laughing.