very pleasedI am using a DAP 4099s microphone so I bought the Sennheiser system for guitars as it was the cheapest option of obtaining a receiver and bodypack transmitter. The SK100 clips right onto a key guard on my alto sax. The Sennheiser unit worked flawlessly and with no glitches.

This wireless pack will make your instrument come to life! No joke! You can't beat the quality of sound that this thing reproduces. Hands down... This unit beats my shure wireless pack without a doubt. Very durable too.

Virtually flawless sound. Can't tell the difference between running through this unit or a high quality cable

Excellent wireless system, I used a few of them, but that one is the best. I'm really happy with Sennheiser.