I do not work for Qwest but as far as i can see in the Denver area folks choose Qwest as a convenient seemless tie into their landline phone. Qwest owns most of the infrastructure and is the giant landline carrier so they have an easier marketing effort. From a financial perspective their packages are less expensive than many.
Personally I use VZW in this area and a reseller for my landline.
I am a Qwest employee in Ogden, Utah, specializing in customer service. I'll be totally honest with you man, I had T-Mobile and would never think about switching to Qwest for wireless phone service. I did because I wasn't getting the service I wanted and now I am happy with that decision, BUT let me say this, Qwest cell phone plans are kinda HIGH in prices compared to other providers, such as my T-Mobile plan I had...
Our main selling points for wireless are the combined billing as you had said, one number service with your home phone with Qwest, AND the nights and weekends starting at 7pm. I always tell the customer they can recieve the 7pm nights and weekends on a ONE YEAR CONTRACT too as Verizon's you need a TWO YEAR CONTARCT. But, us... (continues)