Excellent sound reproduction
I bought one 5 years ago and one day I couldn't pair it up (it can be repaired, I'm told).
It was quite damaged externally, having suffered many knocks during sea trips, but it worked every day without a hitch.
The new one still gives a very good, neutral sound, with good depth of bass without the exaggeration of other brands' boosters.
What's more, it seems that you can pair several of them together, so I'm going to give it a try once I've fixed the first one.