I'd look at Feisol instead. Benro has a very checkered past. Do some searches. Feisol, on the other hand, has a great reputation for customer service, performance - and a big one for me - they look like they do their own R&D and development (not a knockoff).
I'd also not look at Benro ballheads until a lot of people weigh in with them being good. There have been some problems.
For example - http://www.tomwebsterphoto.com/Essays/Benro/benroks2.htm
Not to say that you won't get a great one, but there is definitely higher risk with this than with Feisol, manfrotto or Gitzo.
The problem with knockoffs is that they usually look great - paint, finish etc.. but whether they are actually good or not can be a crap shoot. Some of the things that are said about these is that the composition of the CF is more epoxy (bad) than CF (good for damping), that the layup results in a whippier leg (laid up like a fishing rod), and that the leg locks are suspect, the adhesive between the spider and leg tubes can let go, and they have had issues in being loose or not as rigid as they ought to be.
So, my suggestion would be to look at Feisol over Benro. YMMV.
J.