I love my Cingular but I have heard very mixed reviews from others. A big difference is the level of customer service you get based on what kind of customer you are. It's kind of like when you call the airline and you get either the Plat desk of the no status desk and what they will do for you.

I get great customer service but some people haven't gotten what they wanted. I have been with them for like 5 years, have 4 lines and my bill is like $175 a month (2 blackberry plans, 2 text messaging plans, 4 voice lines, lots of minutes)