I personally don't really care about the price. What I do care about is the company's reputation and if other people have used it on thier cars and can give real feedback on the quality of the tune.
If many users have used the ESS, then I'll probably go that route as well.
It's been quite a few years since 2006 when the z4M has been launched, and I haven't seen or heard of this company. Anyone can put up a website to make a quick buck.
Unless other z4m owners can verify from thier experience with this company's software, I don't see myself going for them.
We're daily drivers that just want some more fun from our cars, we don't have a group of professionals sitting in the garage waiting for our cars to come back after a few laps and fine tune our cars right away....
