Plus : great sound (lots of detail, fat bass with a bit of eq), horizontal spread impressive, plenty of volume, look really cool on stage without disturbing the audience view.
Minus : external finish a bit fragile - buy the covers and you're ok. Covers seem a bit flimsy but do the job as long as you don't throw everything in the back of the van.
I've played with a few returns in my time and these are as good as
I remember using . . .