In my humble opinion, the rules on antenna and transmit power for FRS are annoying - garbage range and prone to interference. I wouldn't want to risk pissing off the FCC or a ham with too much time on their hands by running hot on FRS constantly...
But for occasional backwoods travel with friends or to use in an emergency without clogging up ham frequencies, it's totally possible to reprogram certain Baofengs and these radios to transmit on FRS frequencies with low wattage. In fact, I think FRS was modified to allow higher power now, so the low-end of these radios fits. It's just the antenna reg that they break now.