I have a pair of them which i use as monitors in my PA setup.
I use a bit of behringer stuff. Subs, folback EQ. Generally am happy with it. One of these, however, did break down. (only behringer item i've ever had break down). Under warranty and Behringer replaced it, which was the best warranty service i've ever had.
Apart from the one that failed, they've been good, probably done 25 shows in the past year plus a fair bit of use in my studio. They've been used indoors and out, including at times for bass foldback without an amp. I wouldnt use them as FOH cos i generally use them with a pair of JBL eons as FOH. Without doubt, the eons sound better and clearer.
They do have a lot of low end but that can be EQed. I run a folback EQ anyway and roll off the unnecessary lows.
At the price, i'd recommend them... but like all cheaper things, they won't last forever.