I needed a portable mic for both gigs and recordings while travelling. I bought this one.
It looks nice and has a convenient and practical bag and it comes with two soundhole mic holders. Quickly tried the mic by itself and it works.
BUT when I tried to install it on my guitar when I really needed it I had two major issues: I just pushed the mic into the first of the two holders as shown in the instructions and the holder broke right away (veeery delicate). The mic would still stay in the holder though, since only a little piece was missing, so I went on and started recording... A whole lot of noise and vibrations, on specific frequencies, made it unusable.
I then thought that could be because of the slightly broken holder, so I tried the other one, but same story. Basically, if I want to use it, I will have to sort out another way of placing it on my guitar.
In the end, this was my worst purchase ever