Full disclosure, I'm not an audiophile, but nevertheless I'm impressed with the audio quality; YouTube Music and Google Play Music both sound reasonably 'full' and a snug seal on the ear makes whatever bass is present feel at least slightly 'punchy'.
The case feels like it will offer a decent amount of protection when thrown in gym bag, and the netted organiser inside to keep cables separate is a nice touch.
What I don't like is how much they stick out of my ears. I don't have any wireless earbuds to compare them to, but my experience with these has at least convinced me that wireless earbuds don't automatically suck anymore. Here's hoping for a Slim++ model in the future.