I bought 2 chatterboxes. When the wife was riding on my bike with me we plugged hers into mine and we enjoyed being able to talk to one another but then again even after 21 years I actually like my wife.
Now that she has her own bike the Chatterboxes are even handier. I can warn her about upcoming curves, obstacles or idiots etc. and she can easily let me know when she needs a "buttbreak". We live in a rural area but do go to Tucson once in a while and getting seperated by traffic is no longer a worry.
The VOX is a bit tricky and takes some getting used to but once you find your sweet spot the radios work well.