The approach that you're taking in trying to learn more about the machine makes sense. Since you're not getting many responses right away, consider asking your sale-type for a list of customers that use this product. Be aware he/she may be nervous about giving you the list for competitive reasons. So, just tell him/her that you won't divulge their list and if he/she doesn't give you the list that you'll have to assume that no one is using their product and there must be something wrong with it.
I would also want to tell you to be careful with the chinese machines. I am working with a inline chinese AOI, it is cheap, but lots of falls alarms, bug problems, poor english in the menus, poor support. On the first view it seemed good machine, now I have lots of headaches with it.