Originally Posted by nethak
I'd really only complain if this kind of thing is frequently impacting your travel. Last summer, I had three mechanicals in two weeks (DTW-ORD, ATL, and PHL) and after the third one, I wrote a polite letter pointing out the discouraging trend and received 10,000 miles. I was happy

I mean if it happens every now and then I figure it's just part of air travel but the frequency was upsetting enough for me to write in.
I agree - if mechanicals are frequently causing you to be late then you have reason to write and ask why. If they chose to compensate you then good for you. One two hour mechanical though?