Default Thinking of going to Verizon after getting the M8

I have been with sprint for 8 years now. Just got the M8 for the new spark network that according to sprints coverage map, I was fully covered in. We'll, that's not the case. Been having a lot of problems, mainly if I drop to 3g, I actually have no data and no phone calls and can't send texts . I have to wait until I'm in an area that I think may have spark, and reboot my phone. Then I get a flood of text messages and voice mails. This has been going on 3 days now. Apparently this is a mass problem that could be a while to fix. I still have ten days to return it and reverse my contract. Sprint is so bad that if I'm somewhere I don't know where I'm at and try to pull up a route on maps, it will fail to pull anything up, or search for a route until it says no connection, even with 4 bars. It's hard for me to leave since I've been with them for 8 years, but I'm really getting tired of it. Would like to know of anyone else is considering this, or may have left Verizon for sprint and why.