I have a bunch of pedals of all sorts. Boss, DOD, Ibanez, Xvive, etc. and about 7-8 Behringer pedals as well (probably more). I tried a lot more of them and also have various Behringer products, among others, the Bugera 333XL-212, EURORACK UB1002, Ultra-G GI100, Firebird GX108 15W amp, and recently I acquired PB1000 Pedal board. I also have a bunch of Fender, Marshall, Vox, Ibanez etc. products for comparison.
Generally, I like Behringer products and had no issues with them. The pedals work fine and do their job quite well. I don't mind that the pedals are plastic and I haven't managed to physically break one yet. I don't gig but I'm certainly not gentle with them. Quite the opposite, and some of them have more than 400 hours of usage time. My only issue with them is the switch but I recently discovered that when the switch starts giving problems, a fair dose of Electronic Cleaner solves the issue. Still, the switches could be better and that is the only issue with Behringer pedals.
As for the sound, some are not very good, some are OK and a some are actually very good. Obviously, those are personal preferences and depend on the taste. As with all pedals, they might work with some amps well and not that well with others. To compare different manufacturers pedals, eg., the Behringer TO800 Vintage Tube Overdrive with the Ibanez TS808 Tubescreamer is simply pointless. If you want a pedal that works but don't want to spend for the Ibanez, the Behringer pedal will do just fine. And yes, I have both.
The other Behringer product I have (maybe I got lucky!), are actually well made and work just fine. Personally, I simply don't care what name is on the product as long as it performs as it should.
BTW, the PB1000 pedal board is really useful and extremely well made.