Mossy Nissan on I-10 and Kirkwood has been great to work with.

My X is not exactly stock and they have covered several different things under warentee that other shops wouldn't. They replaced a mud filled alternator, a broken motor mount, and even though my X was at 38k miles, they did the labor for free when my started went out. The only thing they didn't cover for me was a hose near the fuel tank causing a check engine light to stay on. They claimed it was split due to the body lift (a reasonable claim.)

I will continue to use Mossy any time I need help from a dealership.

If I don't need a dealership then Starlight Auto in Katy is the best little shop I know of. These guys are knowledgeable and honest as the day is long and that is saying a lot in the auto business.