I have experience with Uprev and Ecutek and now was an opportunity to tune Nissan 370z with HP Tuner. Everything is fast and convenient, but in the case of Nissan it would be necessary to change the load tables to Air mass(mg)
The load tables cannot be tuned so accurately. it would be nice to find some additional features in the future. For example RPM fuel restore that would work properly and the ignition tables could be real angle tables with Airmas axis.
I also did extrem experiments in Hi Det tables, but there is nothing real change in timing.

However, in tests with Cadillac, everything was as it should be...