Used Sunrise twice while on vacation in Phoenix. Once I needed a cab at 11:20pm (wait time ~10 minutes), the second time at 2am (wait time 5 minute).
Charges were low, $4.50 for 1.1 mile, and $7.50 for 2.8mi.
One of the cars was made probably in the '70s, but the driver was super nice. It was his first week with Sunrise, so he got the "initiation" car, which BTW has a broken fuel indicator.
None of the cars had GPS systems, and the drivers asked me where my destination was... one of them even used my Google Maps navigation directions... Not sure if this is a plus or something to worry about.