Don't feel too bad for the purchase price, I almost paid 3 for mine delivered.

I have had great luck with mine
except for it measuring my HP and TQ. I have done all the configs that the book directs, setting up the pitch factor and everything, but have not had accurate HP/TQ numbers. Its on the money with G's, and on the money for times at the race track. I have entered my car at 3,000 just to be a round safe number, and have not had a chance to put it on an actual scale yet, but sounds like I am at least close with your weigh in. Let me know if you have any luck with your GTech, and what your pitch factor and all are set at? I would appreciate it.
Thank you,