The B12 kit is about as good as you can get for a non-coilover suspension and will probably outperform a great many coilover setups out there too. A guy I sometimes hillclimb against has a skoda fabia vrs wagon (which is just a stretched 9N3 chassis) with the very same B12 kit. He has convincingly won the under 2.5 litre class and from the bit I've seen and what I've been told has embarrassed a lot of supposedly more trick cars along the way. You'll be very happy with it.