I have this for my new 2019 Mac Pro to add 2.5" SSD storage. One side of the board is nice and flat under the SSD position. The page shown in the image list and on Sedna's own www page. What is not shown is the side of the river where several chains are sticking out UNDER the SSD position. One is 3.5mm high and prevents any method of attaching the SSD using the supplied L-brackets. (See pic without SSD) I see the photos never show both drives with the L bracket attaching them to the PCIe card. Thus, an SSD cannot lie flat on the PCB. (see picture of 2x blue SSD drives). What the hell? I installed it anyway and both drives are recognized and working fine. Excellent quality but the overall rating I give is due to the protruding circuitry on one side of the board. Hopefully the SSD isn't slowly slipping out of the SATA connector.