We used to use them, but as someone else mentioned it seemed as though every other person was also using them! A lot of hearing other people's conversations coming through!
We now use cell phones - we have the Nextel ones which are like 2-way radio only you only are speaking to a specific person. If you already have cell phones, you may want to use them, if not, the 2-ways are a great way to take advantage of people splitting up and wanting to meet later.