So far, I can train without any problems with it, the only thing that is a little annoying the weight plates are very large because of the sand / cement filling whatever is in there I can see at most in curls and specific back exercises (but there is still; )).
The Star closures could in my opinion a little better grip, but as I said for the price are to be drawn already really fine, but must correctly determined otherwise they loose occasionally.
The barbells might be slightly thicker for my taste, but that's a matter of opinion.
As I said, for the price I find the product succeeded and I could see no shortcomings as far.
Update 18:05:15: Dumbbells still work perfectly, so who deal with it cautiously and not constantly on the weights and unscrewing has for a long time about it.