i got a set, 1 110 and 1 120 about 2 months ago. i can tell you all, from my opinion, these things are ausome!!!
you can keep in touch with others you ride with without a problem as long as you stay in a moderate distance. no more loosing riding partners, or wooring about crashing and being left alone due to noone able to find ya. i ride trails and woods, but can see HUGE needs for such a setup on the dunes.
i think back to a mother and son who got lost in the dunes, and the son dies. had they had these rino's, the son would still be alive today. i have no stock, or interest in the company who makes them, but am just a real happy owner of a set.

i rate them a flat out 5 stars!!!