Anyone tempted to get the T-Mobile iPad Air?

I am upgrading my iPad 3 LTE to the iPad Air. I have always been a Verizon guy. I love their cell service, going with verizon has always been a no brainer.

But I am very tempted by T-Mobile's free 200MB of data. I am currently on Verizon's 2GB for $30/month plan, and I usually get pretty close to my 2GB limit. So even if I try hard, I'm sure I'll have to upgrade from that 200MB eventually, and then I'm paying for data.

Does anyone have experience with T-Mobile's 4G network? I've always viewed T-mobile as an "also ran," but lately they are giving away some good freebies, so I'm giving them a second look.

thoughts?