I've been using the Neumann M 149 for a little bit under a year and it is really a great sounding mic. It is full sounding and works with a number of different instruments. I like it best on stand up bass, acoustic guitar, vocals, and cello. It really picks up the low of a stand up bass or cello and is definitley is my go to mic for these applications. It also sounds great when placed near the resonator of an acoustic guitar as it picks up the low mids and the mids well. It has a rich tone to it and its versatility with rolloff and polar patterns makes it a great all around mic. The warmth that the tubes give off gives this mic a special quality. While I wouldn't say that it colors the sound as it is a pretty clean tone, it picks up a wide range of frequencies and acts with the tube to create a unqiue sound. While it costs a pretty penny if you're looking for a high end tube microphone. Neumann's reputation is well known throughout the recording industry and this mic is as good as any I have used!