My wife and I have been using the FRS radios for years. They are great for car-to-car and in the mall, especially if you don't want to spend an hour in a craft store. If you get a set, make sure you have:
- Rechargable batteries. You never worry about leaving them on all day. My NiMH cells have lasted for years, though I think most still use NiCd cells.
- The 38 CTCSS squelch codes. These prevent you from hearing chatter from almost everyone else; those whose radios are set to a different squelch code or channel, and those who have cheaper radios with no squelch tones. It's not like CB radio where you have to listen to every trucker curse.
- Small size. I have some monster Motorolas that are like bricks compared to my little old Audiovox radios, and we hate carrying them.
- Good sound.
As for range: If I recall correctly, GMRS radios are allowed to go up to 5 watts transmit, vs. the 1/2 watt limit set on FRS, and both share some of the FRS frequencies and squelch codes, so they are compatible with one another. FRS forums have postings from people getting 10 miles between mountaintops or from airplanes, but you shouldn't
expect more than a half mile from FRS, and theoretically, 4.47 miles from GMRS, assuming you have a 5 watt radio. The common GMRS radios I have seen are 2 or 3 watts, and I don't recall seeing a 5 watt radio outside of programmable Ham type radios, so the GMRS range would be markedly lower than 6 miles.
I would spring for the GMRS, since they would probably have done a better job of reaching my wife in the mall this weekend. Forget the extra features like digital compasses, stopwatches, etc. You will never use them.