My dyno tuning was done by @STAGEUP at this location as well. He is super knowledgeable, respectful and he responds to communications. I highly recommend him!!!!! He also happens to have the sickest LSA setup I’ve ever seen or heard.
I’ve heard good things about Corde’s, but after speaking with multiple people who’ve had a bad taste put in their mouth by that shop (and their tuner) it was enough make me go another direction. I was very happy with the outcome.
I have used GoodSpeed Performance in Scottsdale back when I had a set of braided steel brake line hoses installed on my dub'. They did a clean install, so no complaints and I noticed they still have a pretty good star rating. Even so, depending on the task, I would prefer someone that has performed the specific procedure a few times vs. 'we'll give it a try.'
It's a roll of the dice overall. Despite the reviews, if the person working on your car actually gives a shi..., then you'll likely win.