I did a tiny bit of research on the GMRS the other day, and I'm sold on it for a few reasons.
$35 for an entire family up to 100 people, and good for 10 years, and no test.
Repeaters are being constructed more and more right now, at least in my area. People in the boonies are erecting them like crazy, and you can use them if your in range.
Just about every group I have been with lately, use GMRS now.
The costs of these units are down, and just as affordable as a decent CB, but are much much more powerful. 15w all in one units, and 40w base units are on the low end of the spectrum. The UHF bands can use HAM radio antennae, and there is already a massive market out there for them, so the costs are cheap.
You can set up private groups on them. So if we have 15 rigs on a meet, we can set them up so only they hear us talking.
You can call an individual privately, using a pass code you each programmed.
They have a SOS (911) feature, and Weather channels built in.
You can communicate with mobile handhelds.
They have hands free Voice control, with headseats/microphones.
You can set the power range on them, and have about 50 channels available, and dozens of private frequencies.
General GMRS use is NOT enforced. Not like the HAM enforcement is done by citizens reporting users. It's pretty much a money making thing for the FCC, with license fees.
Repeater use is however a little different. To access them, you have to give your registered call sign. This call sign is listed on a public FCC page, along with all your personal information given when you paid for the License. To some that doesn't matter, but to others it might.
I understand that HAM is superior in every way, but going from a rinky dink 5w CB, the GMRS is leaps and bounds better. For the casual user, these are perfect in my opinion.