Very nice it for the gym/running without the bulkiness of a phone. It was relatively easy to pair with my Bluetooth headphones and to sync music from Spotify over to it! I was a little apprehensive due to the polarizing reviews but I'm impressed so far!

Easy to use and reliable Spotify player for all the situations, it proved to be almost indestructible (1st model).
Friendly company too: I made an error when buyng my second generation Mighty and they helped me to solve the problem.

Very complicated to setup/connect
Doesn't really connect to the headphone when not connected to wifi
Doesn't really synchronize the music...
Battery doesn't last long

I love the concept. It's why I was an original backer. I hate lugging my cell phone around the gym. The Mighty is a perfect way to keep my music and podcasts up to date while also remaining unplugged. It's small and portable, and I love the tactile buttons. I don't need to swipe at a screen to change the songs.

That said, I only purchased the Vibe because, after about 16-17 months, the battery of my first Mighty suddenly puffed out and doubled in size, causing its insides to break out of its casing. I contacted support and though it was out of the 12-month warranty, they gave me 30% off the "new" product. That was cool, even though I think the lifespan should be longer than 1.5 years, I get that they are building a new product from scratch and afford them some leeway.

Here are the problem areas that I think they need to work on:
* BLUETOOTH ISSUES: Like the old product, there are still some significant bluetooth pairing issues. Two weeks ago I struggled for 20 minutes to pair the same wireless headphones I've used for a year. I'm tech savvy and fairly determined, but I'd imagine other people would have given up. And every once in awhile, there's a loud monotone noise during playback. I'm pretty sure it's a bluetooth issue as I hadn't heard it with wired headphones.
* PLAYLIST MANAGEMENT: It takes forever to cycle through playlists, and you can only go forward, which means if you accidentally move past your playlist, you have to press the button another 30 or so times.
* GROUPING PODCASTS: They don't group podcasts together, so if you have four different episodes of Invisibilia, they'll act as four unique playlists. It adds to the organization problem.

Mighty Vibe