I've talked to a few folks that messed around with it and they seem to like it. Really havent heard anything on how ease of use. But with any custom tuning its a learning process unless you get a tune from someone else. The thing that really stinks is Black Maxx is no longer available and they have NO plan right now of replacing it with anything. So your choices are buy a used Black Maxx or go with the Mini Maxx. XRT will not support the custom tuning.