@Sn00ten sounds like you literally have all the concerns I *had*
the install is less complicated than it looks (the hardest bit was getting the trim panel back on when I was desperate to test it!)
it works as suggested and completely removes the 'bag of nails' on startup, I have my car on individual the majority of the time for round town driving with everything on dynamic except engine (all the noise and no go
)
as suggested regardless of of what drive select selected it can be overridden by pressing TC off then back on
it keeps its settings on startup (feels weird not pressing drive select 5 times like I have done for the past 6 months)
module very easy to disable completely (stealth mode) via pressing auto start / stop for 5 seconds. (easy way to test is press TC off / on twice and notice you WONT hear the click of the valves)
noise wise, its great! don't get me wrong it won't instantly sound like a F1 car, but the burbles at low low revs are intoxicating , but best of all the 'bag of nails are gone'
for me it adds to the experience of owning this car, without the embarrassing noise on cold start of my 6 month old 50k+ Audi!
I bought mine for 389 euros + 15 euro shipping + some sort of fee for using PayPal .. the total was 411.39 euros which at the time it came out of my bank account was £367.78 it took about 2 working days to come (ordered on the Saturday of a bank holiday arrived Wednesday)
honestly worth every penny as 'smile per mile' tax it will pay for itself tenfold!
seriously DO IT! , if / when you sell the car you will get your money back on the module as 'used' they go for similar money without the hassle of buying from Europe!