I bought my car used, and only took it to Nissan a couple of times: I always felt like I couldn't trust the one near me. I used a Meineke for a while, but after they pissed me off last summer I managed to stumble across a really great shop near my old office. I love that place/those guys. But a few months ago I changed jobs, and now I work close to home and that shop is 15 miles away.
I'll still use them for "big" repairs and scheduled maintenance, but the last time I was there I asked if they could recommend a place near where I live/work for smaller stuff (and emergencies). One of the guys used to work at a shop near me and had good things to say, so I'm trying the new place tomorrow. I'll see what they say about parts, cost, etc.
Anyway, the problem is intermittent: after 3-4 consecutive fails, the door unlocked just fine this morning. So it's entirely possible they'll tell me they can't diagnose/fix it if they can't duplicate it. *sigh*