I bought this with hopes of finally being able to use stereo aux mixes at my live shows. After using a mono wireless system I can gladly say that the improvements when using stereo are second to none. It is like having a mixed studio track sent to you on stage. The clarity in sound is superb! The volume is very sufficient without clipping. If ever you do start to clip to loud a LED indicator will light up red prompting you to turn down your aux output level.
This unit is covered in a rubbery plastic which not only gives it a nice feel, but also gives a professional and clean look when in the audience's view. The metal clip is solid and looks like it will last the high demands of being clipped on and off a belt for many gigs to come.
I have never experienced such high quality sound in a monitor mix.
As a keyboard player I have always felt slightly claustrophobic and enclosed when using other systems in a mono setup. Thankfully now, my keyboards are stereo and backing vocals have been panned along with the sax and guitar. I often forget that I'm using IEM because the feeling of being isolated is eliminated.
I would have liked this system to include a power supply but looking at the price it is easy to understand they had to cut costs somewhere. I recommend using a 9v rechargeable battery to save you running costs.
If you are somebody who would like a high quality monitor mix in your ears during a live gig I would urge you to try the HPA 1!