My wife and I bought these helmets this summer and we couldn't be happier. We enjoy biking together, but communication is always a struggle. Sometimes paths are too narrow, or we just happen to be cycling at different speeds, at which time we have to yell at each other. These helmets exceeded our expectations in several ways.1. Setup was easy. I ignored the vague directions and just watched a youtube video once to connect our helmets. We did not synch them to our phones and it literally took less than 5 minutes.2. Clarity. I read some reviews saying that the quality wasn't good, but that was not the case for us. Not only is the sound realistic, but it is also very clear and easy to understand.3. Range. On the Katy Trail in Missouri we actually checked and we still have good connection at 0.3 miles. Finally I went around a slight bend and the connection started to cut out some as our line of sight diminished.4. Length of charge. I don't know the exact amount of time, but I do know we had at least 6 hours before our first charge, which was this morning. When I put my helmet on it said the battery was low. We biked for about 40 minutes and were still communicating when we returned to the house. Charge time was quick.5. We purchased the visors, which are fairly short, as others have noted, but it's better than nothing.6. Lack of wind noise. When it's really windy we pick up some wind noise, but for the most part it is a non-factor.We absolutely love these helmets. The ability to talk back and forth about the nature we encounter, and just simply being able to carry on a conversation while biking is a game-changer for us.We ordered mediums, and both have a 22" head measurement. The helmet would go a little larger, but not much. If your head size is bigger than that, I'd recommend a large.