I bought a pair of these in order to hoist my JBL 415Ms, and i must say they're quite an overkill, as they are heavier than my speakers themselves!
Great for outdoor gigs as they can be raised incredibly high, but unusable in a small indoor venue due to it's wide legs and minimum height (which is already quite tall).
The handcranks are not my favourite, but they get the job done.
One of the stands i purchase had a stuck lever, but Thomann was kind enough to send me a new one.
Overall a solid and overwhelming piece of gear!