I am looking at getting a Chatterbox from HJC. My dad and I have a set-up currently using a Cobra walky-talky type of set-up. I have a headset with ear bud that I put in my ear, then put my helmet on, and he can talk to me, but I cannot talk back, as it is a PTT (Push to Talk) system, and their is no mic in the helmet. He doesn't race too much, so he uses it to communicate with me during the hare scrambles. I would like to have 2-way communication, as well as an ability to talk to him whem we go riding. (we only have one headset even.) I had been checking out the HJC CHatterboxes, either the Multisport, or the FRS X2 system. I don't need anything awfully expensive. They are somewhat pricy as it is though! Obviously we'd need two of them. ANyone know how the interactivity is? Does the Multisport work with the X2? (One have the multisport, one the X2, will they work together? I would think so.) Quality of reception transmission? I'm just really liking the durability of the units, the VOX, and being MADE for helmet usage, unlike the set-up we currently have, as it is a major pain in the butt to setup, plus it can fall out of my ear unless it is taped in, and the obvious problem of no 2-way communication, just 1 way talking.