I have had my Mighty for a while now. And have never had any issues with it or the app. I like to run often and it is so nice to be able to connect it to wireless headphones. I also like the option to be able to listen with wired headphones. over all I think that Mighty has done a great job with making this product compact and easy to use.
I definitely appreciated this little gear that was mentioned to keep my 10 years old boy away from screens during spare time without loosing the joy of music. This aim is 100% achieved.
Just experienced a little instability that is normally solved with just a reboot. So in general I do recommend it.
Bought my original Mighty when I started working in the mines in Western Australia. Driving a dump truck 12 hours a day can get very boring without music and we are not allowed access to our phones. My Mighty has saved me.