Windstream is a legacy telephone company so if there is one thing they should get right, it's voice. They're the "provider of last resort" for most of their customers. Except for small areas with a fiber buildout they offer 3-6 mbs DSL service. You can get into the low 20s if you're close enough.
My business was eligible for 3 meg service from Windstream while cable offered 200 meg for the same price or even less. That was an easy choice.