The M8 wireless systemworks well and is pretty reliable. The receiver unit is capable of putting out a really loud signal, so one thing that is necessary is to get the volumes set correctly. Itis very tempting to turn up the receiver really loud and turn the recorder or camera right down. I had my camera set at its lowest level and still had to turn the receiver unit down. Doing this reduces noise dramatically.The other thing to do if you want extremely low noise is to get rid of the the supplied lavalier for something better. I changed over to a Primo em172 (Little Clippy) mic which has a louder input and less noise than the K & F one. Result was that the receiever had to be set even lower and noise was insiginificant.So for the price, this is excellent as long as you get a decent mic for it. In my opinion, K & F don’t do the unit justice with the supplied lav.Originally, I was going to opt for the Rodelink but the price of this one was too tempting so I decided to try it first. I’m sticking with this one.It works really well and if I’m honest, I was surprised by how good it sounded. So the sound quality with provided lav is 4 stars for me (maybe 3 actually) because it’s quieter and more frequency restricted than my Primo which is loud and open sounding. Change the mic and you have a gem here, which for me, was a bargain since I could get another set for still less than the Rode.