Chocolate Tempering Machines from alibaba.com

I've been on the lookout for a good mid-capacity (20-30kg) tempering machine. While searching for them, I found some reasonably priced wheel-style tempering machines from alibaba.com which seems to be a sourcing site and most of them seemed to be made in China. Does anybody have any experience with these machines? Are the of comparable quality and design as their counterparts that they look exactly alike?