http://www.diyautotune.com/catalog/m...3280033cd2a1cd



is there anyone out there using these things for their miata?

1) how easy is the interface to use?
2) how close is the tune that's pre-loaded? how many hours on the dyno to optimize?
3) does this solution give up anything to something fancier like a Haltech or whatever...
4) does it work better on any miata iteration than the other? (90-93 vs 94-95 vs 96-97)
5) is there anything like this available for the 99-00?