My uncle has similar, if not identical, radios that I have used with him many times when caravaning. Presuming that you understand the "mileage claim" is just marketing hype, they are great little radios. Most importantly they are rugged for the usage my uncle's family puts them through. I've personally dropped the radios many times, and at least once that I recall have dropped the radio in snow and slush, only to have it operate just fine. Factory NiMH battery packs did not last long, but a set of name-brand AAA NiMHs provide power for a whole day of usage.
Granted, I do not have much to compare these radios to, I have only used one or two varieties of "bubble pack" radios, but they exceeded my expectations and felt sturdier than some of the (early) FRS radios I had used in the past.