As anyone would be. It's not for the faint of heart to pull the brain out of their car, send it somewhere for surgery, and then put it back in. I was willing (and able due to location) to go a local shop and have it done, it was worth the $50 extra I paid IMHO. Mailing away my ECU is what kept me from considering Renntech or PowerChip, the $300-500 cost savings was a bonus. I wish everyone had the option... Cyril drove several hours to get his done, and noticed the difference on the trip back home.