User menu/instruction are vague and confusing, it will get you to know how to use the simple operation. If you want to learn in detail, paid to learn, package from $99/hr to $599/yr.
There are bugs, but the worse one are "missing orders". We were using SixBit to streamline order/shipping processing, print out picking list, packing list, shipping labels, we got complaints from buyers not received orders and that cause some negative feedback and seller rating, because these orders didn't print out and we found the missing order in "fulfilled", with no shipping records.
We now had to print shipping label from eBay as "double check system", just to make sure all order are print out from Sixbit. Contact customer support to alert them this issue several times, each time they reply this issue will be fix with new update. 6 update has been completed since we last report the issue, and missing order still a on going problem.