These speakers blew me away when I hooked them up. I was surprised by the amount of bass they have, although it's not enough for a disco or band for example (but this is to be expected). The quality at loud volumes is great with little to no distortion when you really push them. I'm not an audiophile so I can't give too much detail about specific sound characteristics, but as soon as I heard them I knew I'd be using them a lot for bands, discos, weddings and even outdoor events when I buy a few more!
The mounting is extremely versatile with M10 threads on all sides where the bottom one can be removed to reveal a standard speaker pole mount. They are quite heavy for their size though so you do need to be mindful of what you're mounting them on/to. Speaking of eight, although they surprised me with how heavy they are, they are easily manageable and the weight actually makes them feel a lot more expensive than they are!
They have a speakon/NL4 input and output along with screw terminals which I don't plan to use but I can imagine being handy for installations. And Thomann also sell very reasonably priced brackets for both horizontal and vertical mounting which again would be perfect for installations and even gigging!
Overall these are possibly the best 'cheap' speakers I have ever bought and I'm already planning setups and configurations to use them with. I definitely plan to buy more.