Got two together with the S5850-48S2Q4C switch, one for the up-link, one as the spare set. Work well and haven’t noticed/experienced any issues so far! Great stuff!!

Product supplied in record time with absolutely no issue. The actual service I get is fine and worth more than their price.

Arrived next day and 100% compatible with my Juniper switches. These work perfectly and I could not be happier. FS even reached out to me to check what equipment so was going to be using them in to assure compatibility. Above and beyond on the service front for sure!

Works well on my Cisco equipment, they've always worked and linked up at the rated 100gbps without any issue.For what you pay you can have plenty of spares around and still be in the green compared to even a "used" Cisco branded QSFP28.Excellent results so far. Great packaging and delivery!