The rest of my family has been on Ting (my e-mail is associated with their account) for a few months now. What started out as a couple of LG Marquee refurbs is now an LG Marquee (littlest brother, who doesn't use his phone all that much), two Galaxy Victories (one used ex-Ting, one used ex-Sprint brought over soon after BYOSD allowed LTE phones) and my dad's Samsung M370 refurb (a $40 phone is less painful when ruined than a $150 phone).
In the case of my mom and brother (the two Victories), their coverage was upgraded when switching to Ting; they both previously had Virgin Mobile, though my mom kept a Tracfone on Verizon for areas without Sprint coverage. You get voice and SMS while roaming, which is fine for them since when roaming that's generally all they need. No roaming data, but the only 3G roaming that I know of in this area is one or two ex-Alltel sites, and that's not worth signing a contract for.
My dad, who moved from an AT&T Tracfone (and before that a Verizon Tracfone) has more or less comparable coverage to what he had before (remember, we're talking about someone who uses practically no data on a non-smartphone).
After making it clear to these family members that voice and texts are dirt cheap, but data is not, usage across the four lines has settled into the 1000 minute, 1000 text and 1000 MB tiers, for a total cost of $71 + taxes and fees per month. Yes, three $93 phones were bought not long ago, and two $150 phones were purchased more recently (plus a $50 phone). But with the monthly pricing we're coming out ahead, particularly if you compare to Verizon, where those same four lines would be $30 + $40 + $40 + $40 + $50 = $200 plus taxes and fees with a Share Everything plan. Even EPRP would run us $140 + taxes and fees...which would put us about even if I rolled my individual plan in as the fifth line but then we're all under contract and I'm not quite halfway through mine.
For their usage patterns (a fair chunk of voice and SMS, plus a reasonable amount of data) Ting works excellently, and I've been pretty impressed with their customer service (though I wish they had live chat customer service in addition to their phone, email and Twitter channels...yeah I'm choosy). I probably won't switch in the foreseeable future, as I don't want to stop using 3GB or more of data per month (about 80% on 4G at this point...that number will probably hit 90% next billing cycle), despite my low minute/SMS usage. But if Ting's data charges were half of what they are, Ting would at that point be good enough for even I to consider paying my Sprint ETF and switching to them, allowing me the freedom to upgrade my phone when I felt like it rather than once every ~22 months.