Well being a former Cellular Engineer, as well as a customer, I am leaving VZW to go to Sprint.
Sprint has done a decent if not a "great" job of clearing up there Customer Service (CS), the Business side of Sprint CS should be the what all CPC's CS groups should strive for IMHO.
VZW, who I was with for 10 years, has slowly deteriorated into a "nag" cost company. What I mean by that is besides the actual plan costs, and they are spendy, is no where near the final bill cost you will pay. Alone right now I have 13 additional "nag" charges, not including my State's cut! So for a plan that should run me 99.97/month for 4 phones is actually running me ~144/month. Not to mention all the "hard sales" that are now going on when ever you call CS for support, and the dwindling TSC's in my area. The nearest one is about 20 miles away!
I recently reworked my business plan and was able to move the entire company over to an "unlimited" plan with Sprint, for 55 phones, that neither AT&T or Verizon could get close too! Let's put it this way, I got a nice raise for saving the company $2K/m and everyone gets navigation/txt/data unlimited, while the other carrier's only offered Voice!
Coverage; yes there is always the coverage issue, and the PCS frequency that Sprint uses does have building penetration issues, and that may get worse but that is another story for another time, but the coverage and roaming agreements that they have worked on for the last several years has greatly improved. I travel all over this country and other countries too, and sometimes the VZW is the only one with service, sometimes the Sprint, and sometimes neither.
So for my money, and I do have decent money, I am moving my family to Sprint. Not only will they be on an "unlimited" plan that is being offered for my 4 phones at 109/m, Sprint was able to inform me of my "close to actual costs" and with taxes and surcharges my bill will average about 125/m. That saves me almost 20/m, but adds EVERYTHING with no limit! I like to keep my money, and the deal for the personal phones is what Sprint is adverting in my area.
For me, I will be moving to, already there with work, Sprint and the Hero. Of course YMMV.