I have bought Talkabouts for almost every member of my family, and they use them all the time. My kids and nephews really enjoy their Motorola/Disney ones. My parents cruise a couple of times a year and just love having their radios on board. They have had several people come up to them and ask them where they got them, or regretting that they did not bring their own radios with them.
I would caution that if you are aft on deck 1 and the other person is forward on deck 9, you might have an issue due to all the steel between the two of you (as KatHuss mentioned). I would also note that it is not legal to use the Talkabouts (or the Cobras or Unidens or...) in all countries you may visit. The FRS (Family Radio Service) was set up in the USA as a set of frequencies that could be used without an FCC license, as long as the radios did not exceed a certain transmitter power. Other countries are adopting similar approaches, but not all, and certainly not necessarily on the same frequencies.
Hope this helps somebody!
Mike