I'll be interested in this thread and other's experiences and recommendations.
I have used a couple in the past that I didn't like.
More recently (year or so ago) I bought the Jaybird Bluebuds X and they have been great for the most part. My problem is that the provided earbuds didn't work for me - none of them fit well and would eventually slide out of my ears a bit when working out. And when that happens, you lose the tight seal and the good bass and volume goes away.
I tried to solve it with Comply Foam tips which I love, but the stems on the Bluebuds are so FAT that combined with the foam, they are hard to get in my ears. (Maybe my canals are smaller than average, I dunno). Anyway - the fit is hard to get right and isn't always comfortable.
Other than that - they had great sound, volume, bass for what I was wanting. Battery life was okay. Could've been better.
In anticipation of getting the Apple Watch, and upon tearing my Comply Foam tips, I went ahead and bought a couple new Bluetooth Headsets that have gotten decent reviews:
Jabra Rox. Similar to Bluebuds. Smaller stem (apparently) and Comply Foam tips made to work with it. Look forward to trying these.
Sol Republic Shadow Wireless. They are a similar style as the LG Tones with the piece you wear on your collar - but that should provide better battery life and lighter buds in the ears. Right now they are only available at Best Buy, but will be released at other retailers in a month or two I read.
Both are arriving today so I look forward to checking them out.