I have had Sprint in this area for about 7 years now and have never had a problem (i mean unless you are in a building or something then it can be an issue) but honestly in my area most people with VZ or anything else don't have coverage when I am good!
I'm south of Cleveland - Strongsville / North Royalton / Brecksville areas....I just switched from AT&T due to dead spots throughout the drive to and from work (Strongsville to Brecksville) and their prices.
I jumped to SPrint, my bill went down $70 / month and I now have good signals everywhere I've been.
I have Verizon, and did have for the last 3 years before I left Cleveland about 3 years ago. I get up there quite a bit still, and I also have my same 216 number I had when I lived there. Very, very little issues. The wife's family is on our plan, and they have no issues either. Most of my friends have Verizon as well, and there are no dead spots I have found in that area. Even in the outer areas of Cleveland. *shrug*