Although I'm very happy with this harmonica holder, I would recommend that you spend just another two euros and get this one instead: K&M 164/16 Harmonica Holder
It's not that this one is bad or anything, it's sturdy, comfortable and easy to operate. All I would say is that because it essentially wedges your harmonica between two pieces of metal, it can scratch your instrument when your putting it in as opposed to the other I've recommended, which has rubber along the metal for extra protection and stability.
I would definitely recommend the harmonica/ harmonica combo as a whole though. Is adds such effect to your guitar playing, you can just play simple chords and blow along with the harmonica and make something sound so nice with such ease.