Super tempting.. As others have mentioned, not for heavy data use and geared toward family-plan type sharing.
My gf and I both have postpaid phones with T-Mobile, but we also both have Virgin Mobile phones on the old $25 plan. Around 100min/month voice, 100-200 messages, and 100-200mb data, for each of our phones. Ting could turn out being even cheaper despite our grandfathered rates!
Very very interesting. I'm curious to see how Ting does. I don't need a lot of data (or anything really) because I have my T-Mobile phone, but we keep a spare phone for things like Craigslist and what not. Plus, while traveling, Sprint works amazingly well. We've gone on a couple of trips and several times we found our expensive Galaxy S II phones showing "no service" so we pulled out our Virgin Mobile phones.
Castrol EDGE 5W-30 is my drug of choice.
Toyota | moving forward
Primary: Galaxy Note II & iPhone 5 (AWS): 5 lines, 1x $15 4.5GB data, 3x $2.99 T-Zones (truly unlimited 4G data), myFaves, corp discount + $10/mo loyalty discount = $88/mo tax inclusive
Secondary: iPhone 3GS: Airvoice Wireless, Samsung Fascinate & HTC Trophy: Page Plus