Matt, might want to get clarification non the 1GB limit. The plan descriptions seem to imply only LTE is capped at 1GB, then after that your speed gets throttled.

http://www.t-mobile.com/cell-phone-plans/family.html

"Unlimited talk, text & data while on our network
Up to 1 GB of 4G LTE data (Speeds reduced after 1 GB)"


Edit: I see, after hitting 1GB they drop you down to G2, which is almost worthless, IMHO.