Hello Thomann!
I ordered two of these speakers around 9 months ago, and they have seen action in all kinds of circumstances ever since. Sometimes they might find themselves on the floor, working as monitors, and sometimes they might go up on some poles and work as FOH-speakers for smaller concerts. They've held up well, so let me get into closer detail.
As a FOH speaker, I have to compliment the speaker's power and ability to project sound surprisingly well even at bigger spaces. I didn't really expect these to do much more than a few 50-100 person pub gigs as FOH-speakers, but they held up well in a outdoor presentation. There was more than 300 persons in the crowd, and no-one said that the speakers we're too silent. If you're not a SPL-hunter, you might actually be able to make these work in surprisingly big venues. As always, don't forget to bring your subs, unless you're just amplifying a guitarist and a singer.
As monitors, these speakers are excellent. Of course a graphic EQ of a digital mixer comes in handy when killing off frequencies feeding back, but 100 % of the singers who've been using these speakers as monitors have been happy about the way they hear themselves. I just used these yesterday for two singers as monitors, as I needed to make sure they can hear themselves over a naturally loud 12-piece funk band, and there were no issues whatsoever.
The durability so far has been great. I'm not throwing these speakers around, but I'm also not the kindest owner, to be honest. Sometimes they've had to withstand a little rain, and sometimes they've been moving around in a case I've transported them in. None of these things have impacted the performance of the speakers. I'm not expecting these to hold up forever, but so far everything seems to be good.
So are these speakers good compared to, for example, 15" JBL PRX:ses? Well, not really to be honest, but they are in a totally different league, when considering the price. Are these speakers good for the amount of money they cost? Definitely. If you own a graphic EQ, you'll be able to make these 185 euro per unit speakers sound a lot more expensive than they are. They seem to hold up quite well, so I don't see any reason, why not to buy these speakers. If you don't like scratches on your gear, make sure to also buy the covers made for these speakers.