The micophone itself looks and feels quite good, allthough it also feels a little light (which is usually a bad sign). It even comes in a very professional looking carrying case. Perhaps all of this is done just to hide the very bad recording quality of the microphone. At first, I thought there was something wrong with my audio interface (Tascam US220L). I sold it immediately, and bought one of the best ones available (the Focusrite Saffire 6 USB), I even bought some new cables.
None of this could improve the sound quality. The output levels remain extremely low, forcing you to turn the gain up, ruining every bit of quality that was ever there. Recording vocals is therefore impossible, unless you hold your mouth right against the mic. I find this quite strange, as the C-1 is actually a small diaphragm mic (even if it presents itself otherwise), which usually pick up more sound.
I have come to the conclusion that my microphone is either broken, or that this is just the quality I paid for. Either way, behringer should really focus a lot more on quality control, even for the extremely low price. I would recommend buying a slightly more expensive mic from a more trusted manufacturer.
Ps. For everyone looking for a cheap mic, the Behringer C-1 is the exact same mic as the Samson C01, so don't get fooled by the price difference.