Well, I look at it like this.
After alot of opposition from the competition and the obvious design rip offs early on it stands to reason Behringer will get a few products right.
Here down under gear is expensive and Behringer have done alot to make gear affordable for those starting out but to be considered professional there are some things you don't touch.
But the knock on effect has been to keep all gear in the market at more reasonable costs.
When you look at their 32X digital mixer and a few other lines including they bought out some reputable brands you can see they got some serious R&D happening.
But like most am wary as I have bought some crap Bass and an Accoustic modeling pedals from them that didn't stand my rigorous use and got screwed by the company that sold em to me as they went out of business keeping the broken units and never replaced them under warranty. Okay we're talking $140 all up but still it leaves a bitter taste in your mouth.
On the up side some better built stuff has lasted over 10 years. A couple of UX weighted midi keyboards and a tube pre amp and a V verb unit that is getting classic recognition. Oh and a AHA8000 that gets some love.