I've got one recently and think it's very good, not had it long enough to comment on durability but it's s very simple motor /belt driven drum so should last for ages . Build quality is pretty decent & not to noisy although I use it in a garage, mostly due to if it leaks it won't cause s problem.
I personally think the results are better than a dry media tumbler ( which I still have ).
The lyman magnetic one is similar in that it's a wet media system and may be quicker but I think it's even more expensive .
I would recommend a media separater as it makes life easier and you obviously have to dry the cases as well.
I deprime before use and so the primer pockets get cleaned as well ,if the primers are left in moisture can take some time to dry unless using a heat source (oven).
Don't know if it work hardens the brass and have not heard anything to that effect,the process is used commercially to de burr items do does have good record.
Hope this helps any quedtions feel free to ask .
ATB James