Brendan is one of the most knowledgeable tuners out there and that's what you should be looking for in anyone tuning your vehicle. He really understands what is going on with the engine and how to safely increase power.
I have a 135 and he's tuned all of my friends' cars, M3s(e36, e46 & e92)CLK63s, SL55s....not ONE SINGLE hiccup! His personal M3 puts down almost 430whp! His cars consistently make more power than the competition.
If you're able to travel up, this weekend, it's a great time for a visit. There's 2 events up here on Sunday if you want to see his work for yourself.
PM me & I'll give you my #.
Good Luck with your choice.
Everyone has a photographic memory, some just don't have film.