I decided to try out the solo 3's because they had the W1 chip, and the 40 hour battery life. I've been using them for a couple days and overall have been impressed. The range of the headphones is borderline ridiculous, I can set my phone at one end of our work building and use the headphones at the other. The battery life also living up to the 40 hour claims so far.
I was interested to play around with the W1 pairing process, since there aren't many demonstration videos around yet. Pressing the power button brought up the connect panel on the phone. After connected to the iphone, they showed up on my ipad pro and apple watch.
Interestingly, they did not show up on the apple tv (4th gen), and had to be manually paired. Once manually paired to the apple tv, they didn't show up on the other devices anymore and the connection processes had to be re initiated on the phone. I also noticed that if you "forget" the headphones from any icloud device, all icloud devices will forget the headphones--which is probably as designed, but interesting.
The sound quality is not as good as my wired earbuds, but better than I expected. There is much less emphasis on bass than you would expect from reading reviews of older Beats products.