The Baofeng UV5R is the most prolific and popular dual band model.
I have some good ham radios but I use the Baofengs most of the time since no one else in the family is a ham and using them as just person to person walkie talkies means they become familiar with them.
As BD said, they are cheap. I will add that they are also very versatile. You can program them on all kinds of UHF and VHF bands including ham freqs, business class radio, MURS, GMRS/FRS, Marine, and some more obscure freqs into them. You can also program UHF/VHF EMS/Fire/ some police (who haven't gone to digital) and use it as a public safety scanner. Not to mention regular FM radio stations.
Technically you aren't supposed to use them on GMRS/FRS or MURS or on business freqs, or on ham without a license but using them on GMRS/FRS, MURS and business freqs is very common. Literally millions of people ignore the FCC regulations and use unlicensed GMRS radios. And in an emergency, there are no rules. When I was in Alaska a few years ago, my wife and I took them on our hikes in case we got separated. I had programed a couple repeater channels and national park operations channels into them which I monitored. I was surprised to learn that the NP base operations on Mt. McKinley use use GMRS to communicate with climbers up on the mountain. Many of these guys were using Baofeng radios.
As for range...they are 4 watt radios. You get a mile, maybe a mile and a half radio to radio, depending on antenna. (upgraded antennas help with range. Maybe 2 miles line of sight over water, or mountain top to mountain top. Repeaters are a whole different thing. And...there are a whole bunch of aftermarket headsets, ear phones, blue tooth adapters, microphones available for them. I just bought a set of remote headphones/microphones that fit in a motorcycle helmet so we can use the radios when riding the mini bikes.