I'm not sure if that is for a good or bad recomendation but every tuner has had there failures and made mistakes, its how they deal with them what counts, any tuner that says they havnt had a failure or made a mistake is lying imo.

And don't risk more than you can afford to loose, its gonna of cost me about 6k for the supra for 3k miles but when it worked it was mental, and I'm happy I've had one and now realise for 500plus bhp awd is the only way