My experience is that I ordered 3 jamma extension harnesses from them. They were complete and utter crap. One was DOA, all didn't route all of the wires, another had intermittent connections, all of the games acted like they were sick when hooked up to them.
Refund took a long time.
Bob's equivalent worked perfectly -- all 3 of them, no issues, everything connected, great quality wires, etc. Exactly what you'd expect.
This board is filled with stories of their x-1 boards being disasters, poor customer service, not responding when faulty products are shipped, etc.
To each their own.