I've put my MiFi through its iPad paces. It does drain the battery faster, in about 5-7 hours with continuous use, but that's certainly good enough to last until I can get somewhere to charge it up, again. Can't say enough about how fast and stable it is, too. Have been using mine almost continuously for the last five days, and haven't had the first hiccup with MiFi. In this part of the country, at least (southeast Tennessee), Verizon's coverage is vastly superior to AT&T's. The alternative to AT&T's 3G coverage (and the fact that work pays for my MiFi and its unlimited data plan) is a large part of what encouraged me to take the plunge and buy an iPad in the first place, and it has confirmed itself as a worthwhile investment in that respect.