I went very simple and got the Sena SMH5 dual pack for me and the wife last year. I also purchased their extra mount kit which gave me everything I needed to mount on 4 helmets for about $250 total (Dual pack and extra mounting kit/speakers/mics). I did take advantage of a sale at J&P Cycles when I bought them. I have the wired mic and speakers mounted in our full face LS2 helmets and the boom mics on my LS2 rebel half helmet and her LS2 track 3/4 helmet. We can hear each other perfectly no matter what helmets we are wearing. I just simply move the main unit between the helmet of choice for the day. I have made and taken phone calls with both helmets and people do not realize I'm on my Trike going 70+ down the interstate or 60+ down the highway/byways. My aunt and uncle have the integrated Sena half helmets and you can't tell the difference between theirs and ours. In fact, due to their experience with theirs, they were the first ones I called with mine from the Trike. I have only ran mine dead once and that was after 5 days of riding back and forth to work (1 hour each way) and then a full Saturday and Sunday riding with my wife. It went dead on the way home on Sunday. So battery life is phenomenal.
To answer HogCowboy's question, they are very glove friendly. I can use them with my thin gloves, my thinsulate gloves and my thick heated gloves. The SMH5 only has 2 buttons and work similar to most single ear bluetooth phone headsets.
The biggest thing is to download the management app to your computer and update them first thing. This will update the firmware and, on mine, unlocked extra/updated functionality as far as bike to bike comms across manufacturers and with other Sena units as well. This will be tested when we are able to ride with my aunt uncle soon so I cannot fully speak about it yet.
The SMH5's are simple and provide simple comms between us and simple phone connection to our individual phones. It also works with Siri and Hey Google. I use Siri exclusively if I initiate a call on the Trike and Siri has never not understood who I wanted to call. I have not found a voice command that works with Siri that doesn't work with the Sena units. They were and are the best bang for the buck for simple comms in my opinion.