A very good product, amazing value for money.
The transmission range from transmit or to receiver was tested beyond any distance you'd actually perform with, through various closed doors and corridors, the signal did not deteriorate and it must have been over 30m. On a clear stretch with no obstacles it would go much further.
The signal to noise ratio is not bad at all in mono, but when in stereo it does jump up and would be a little more annoying. However, you would only expect a cleaner signal from higher priced units. I often use high-end Sennheiser packs, and whilst they are much better. For the price of this LD systems unit, I cannot fault it.
Protective casing is good. The included headphones are surprisingly great, but I use my own custom moulds.
The sound quality is good. You can hear a small difference in the quality as the bit rate will be reduced, but in the frequency spectrum as a whole, it is reasonably even and with a good headphone mix, can provide a great monitoring sound. I myself am a singer and often stand right in front of a drum kit. I find this product to do everything I could want from it to a great standard.
Setting this up could not be easier, and also worth noting, on a new set of Duracell batteries, I find the pack lasts for four, two hour gigs. It may do more, but I prefer not to run batteries to low incase they cut out mid gig!
A product worth buying!