Delivery was on time. They did what they were supposed to do. I have run these modules on several switches of various brands. They were all right without any issues, each working like a charm. Worth 5 stars.

I replaced a new series of network devices and needed new modules to maintain a stable 50 gigabit link. I used a pair of these BD units and they work flawlessly. Don't seem to get hot or anything like that. Zero problems. I would buy again when I have that need.