I have had mixed results with them. They changed out my house batteries, but I supplied the new ones. He fixed the fridge in the 2001 when everyone else said trash it. He also fixed my AquaHot and the cost was so high it prompted me to learn how to fix it myself, so I learned a lesson there.
Michael is a pretty good technician, but not necessarily a good businessman. You have to know what to take him and that unfortunately requires experience. Coach mechanical issues are not their strength but he seems to do some generator stuff okay.
It certainly is a shame that there is not a first rate RV repair facility in Houston. You have to know where to have various things done. I certainly had good luck with Stewart & Stevenson and I used a yacht place in Kemah that knew Cruisairs, the Birdland did a pretty good job on them as well. There are a few good AV gear guys, but none as good as Nick or the Marathon guys. I have also had pretty good luck with Prevost in Ft. Worth, where lots of folks have not.
Unfortunately it's just not a simple, straightforward solution. Really outstanding service usually comes with an impressive price. I'm usually okay with paying if the quality is there.