Go with her while she takes one for a test drive. If she has trouble understanding how to make it work without you telling her, move on.
None of the tablets other than iPad have any visible software upgrade plan. Given the dearth of upgradability on Android phones, I wouldn't be holding my breath for Android tablets to get better. At least not in a way that benefits a current buyer. Maybe the buyer 6 months or a year from now, but not necessarily today's buyer.