The design is good. The button is discreet.
The on/off switch is simple.
The lighting to tell you what's happening is clever, but you need to keep your instruction manual around you, if you want to know what they mean.
Green flash twice for this, flash three times for that, flashes once for this.
Blue flashes twice for this, flashes once for that.
Flashes blue and red for this...
And so it goes on.
The earpieces are perfectly fine. As are the two ear hooks for your size of ear.
The PROBLEM is that when you hear someone else on your bluetooth, who is using theirs (same HS-500) there is way to much background coming from theirs. I had someone who was in their house and I could hear so much going on, and it almost muffled her voice. At one point I thought she could have been in a railway station.
The mic should be sensitive to only up to 1 metre away - if that!! Not 10ft or more.
My clock was 8ft away from me, and she could hear ticking over my voice.
So while I wanted to give it 4/5 (as 5/5 would have had to be spot on perfect), I can't. I have to give it three, as the main crux of a bluetooth is to give and receive clear wireless audio. This doesn't do it all that well in my view.
You can use it. And it's ok. But after a while, with all that background noise, it's just a little too frustrating to keep saying "sorry, can you say that again........ sorry, again please?".
Am contacting Amazon about this problem, to see if there is something that can be done about it.