I just bought a Snark tuner to try out. Many of my colleagues have it and they have nothing but positive things to say about it. I have had clip on tuners before, or at least an extension to plug in to my regular tuner.

The Snark is very quick and responsive, there is no lag time waiting for the tuner to focus on the pitch. There are settings to either pick up vibrations directly from the instrument or to pick up sound through the microphone. The pitch level can be calibrated from 415-466.

This tuner is great for bassoonists because it can easily clip onto the bocal, or onto a oboe/clarinet bell. I actually purchased this tuner for my contraforte and like most tuners it cannot register the lowest octave. That would be my only drawback.