yes, when I bought my condo five years ago, when they were still called quicken loans. the whole process was incredibly stressful because it was my first home purchase, but as far as I could tell they were fine. did everything online, offered me 3.5% on 30y fixed.
oh, I know less about refis than I do (which already isn't much!) about initial purchases. but I did find QL/RM pretty good in terms of accessibility and responsiveness.