yeah, i have to agree that from what i've read, ECUTEK is reliable. Also, I would understand that the chances of glitch occurring would be higher if i had some serious and maybe inappropirate mods like a BOV, intake, bigger turbo, NOS, etc, but my car is bone stock. I've got an appointment at the dealer to get it checked next week.
It did make a significant change in mid-high end acceleration.
As far as how it would affect an STi, honestly bro, I don't know. I have to defer to someone else.