I had been with T-Mobile for years and was completely satisfied with their phones, reception/service and plans. The T-Mobile online support team is fantastic.
Three weeks ago I went into this T-Mobile store with the intention of spending a lot of money, totally upgrading everything. The store was empty except for three guys milling around together at the back of the store with their buddy, an employee who worked there. I was never greeted, spoken to or even acknowledged while I was in the store. I felt uncomfortable so I left. Up until that point I had been undecided about what phone/plan I was going to buy and which carrier I was going to go with.
I went home and with one click I bought a new phone and a new plan and with another click I cancelled T-Mobile.