I have bought Ubit risers throughout one year. During that time I have experienced only one dead riser of total amount of 36. The product is stable and easy to be connected to PSUs. One point to consider in the future: it would be nice if Ubit could include a Molex to Sata power cable with risers so the cable management of the rig would be easier. It is easy recommend the product cause I think its best in the market!
Im not tested the riser at the moment , but overall they looks good.