No point asking Matt about Phil's training. Kinda like asking Usain Bolt who taught him to walk.....lol
 
I won't dispute/defend if Maroun failed to do some basic checks (call him & politely raise the issue with him). I've seen that happen in many places. Experience has always taught me to give my cars a "trial" period after tune & go back to the tuner immediately with any issues/concerns. Only slowly do I rebuild my confidence after a tune. I've also learned to give a detailed instruction/checklist along with my keys. When I had Matt tune my car before, I gave him the engine specs (comp, rpm limit, hardware list etc), engine weaknesses (block), concerns & a list of things to double check (timing, boost etc). I'd been screwed that many times in the past.
 
My advice to you Steve, is to try limit the amount of involvement in your build to allow for some ownership/accountability. My ideal scenario (unless they price silly) is for the builder to be linked to the tuner. Avoids finger pointing & if something goes wrong, they basically have no choice but to rectify the error without dispute. Obviously no one will give a firm warranty, but you do get some inherit protection.
 
I'm not gonna "kick" the Wolf, but I wouldn't be willing to gamble on it either. Everything comes back to finding a trusted/experienced tuner & going with their recommendation/preference. As Rob said so very well, they all do basically the same thing, some are more familiar than others & the level support for inevitable "issues" is essential. Hence why I'd tend to go with the more mainstrain ecu's (Hitman also does Haltech support I believe).