I have had the Uclear for a year and a half, and no problems with voice quality on calls, or bike-to bike. If you are standing close to a second person you are synced with, you may hear some echo, and it can be distracting. The headsets work great on bike to bike and offer clear understandable voice communications. Of course GPS and phone works very well, and the headsets can be used to voice dial, answer, and do other functions with compatible phones.
The Uclear does an amazing job of filtering out wind and vehicle noise. I set my buddy up with a second headset for a ride, and I rode a FJR, while he was on a Harley Sportster. When he started his bike, I could clearly hear his engine noise, and within 10 seconds, the Uclear completely filtered out that background noise, and voice communications were clear. The Uclear is full duplex and the voice activation works flawlessly. It is like having a phone conversation in that you don't have to pause to hear the other person, in other words, you can receive and send at the same time. This avoids the awkward situation where you both speak at the same time and neither of you hear what was said. It is just like having a conversation. Uclear offers a PTT if you want to also use a GMRS radio, but BT range on the headsets is excellent in line of sight situations. I have used the headsets continuously for 11 hours without a low battery warning.
The best addition you can make is to buy the Uclear earbuds. These earbuds offer good noise isolation (hearing protection) and very good sound quality. I use my Uclear HBC220 headsets on a motorcycle, with a Garmin Zumo 590LM and iPhone for GPS directions, a variety of music inputs and phone communications. The earbuds incorporate a microphone in the wires that hang down from the earbuds. I am able to not only hear good music with significantly reduced background noise, but bike-to bike communications and phone calls are clear, without noticeable wind or vehicle noise intruding on conversations. Most calls are clear, but if the microphones are not properly places, people I talk to will complain of some echo. The earbuds overcome the problem that sometimes external wind noise and earplugs will make it difficult to hear music or voice through the speakers. You can use very low volume levels (I use the lowest), and get very good bass response in music, and clearly hear the audio sources you select.
I have the standard speakers in a Shoei RF1200 helmet and can use the earbuds with no interference or pressure. So I can either plug in speakers if I want to hear more surrounding noise, or use the earbuds, especially for longer trips where I don't want wind and engine noise. I have removed the Autocom headsets and mic, and really appreciate not having that mic shoved into my lips.