I got this to replace original Apple 1MB board. The board works as advertised. Just plug and play. Takes very little space and allows easy access to the board in neighboring slot for HW debugging, which was previously obscured by large Apple board.
The quality of board is good, as shown on pictures. It was shipped fast, and packed well. The seller provided dedicated email for technical support, which I did not need to use, since everything was working.
I would recommend the seller and would likely buy again from them if they will come up with some other interesting gismos