Serves its purpose when used within its limits.  The audio quality is fairly good, especially when using the upgraded lav mic.  Biggest drawback is the very limited range and the vulnerability to radio interference.  If you keep the transmitter and receiver close (30' or less), and are considerate about placement, they work well enough.  We were using this for an outdoor commercial shoot, into a Zoom audio recorder.  We found that if the receiver was too close to the Zoom, it picked up lots of interference.  The solution was to keep the receiver at least several feet away from the Zoom.  It's also worth mentioning that these units will eat up 9v batteries rather quick.  Figure about 5-6 hours of usefulness on a battery.  There are better wireless lavs out there, but they cost a lot more.
Serves its purpose when used within its limits. The audio quality is fairly good, especially when using the upgraded lav mic. Biggest drawback is the very limited range and the vulnerability to radio interference. If you keep the transmitter and receiver close (30' or less), and are considerate about placement, they work well enough. We were using this for an outdoor commercial shoot, into a Zoom audio recorder. We found that if the receiver was too close to the Zoom, it picked up lots of interference. The solution was to keep the receiver at least several feet away from the Zoom. It's also worth mentioning that these units will eat up 9v batteries rather quick. Figure about 5-6 hours of usefulness on a battery. There are better wireless lavs out there, but they cost a lot more.