Rodney, I have tested B5s myself and been able to do roughly 1100 down, 275 up. Granted MCS 9 wasn’t stable on the link, and I typically saw MCS 7.
The radio was operating @ 80MHz x2, 75/25 mode at 2ms TDMA window. SNR was @ 32, signal @ -52 both ends and operating in UNII-2A & 2C (was intentionally avoiding UNII-1 and UNII-3). Link is .4 miles and running very low power, clear line of site.
I believe there may have been a multi path issue, and I never got to see it fully resolved as I have moved onto another WISP. Either way, the link was incredibly stable, signals, rates, bandwidth, ect. I have never experienced stability like that with the Mikrotik, UBNT, and Ligowave links that I had worked with in the past. Granted what I would say is the mimosa equipment does appear to be a lot pickier with clean channels, Mimosa is doing a great job of providing the tools to troubleshoot this.
I have used UBNT AC products in AirOS 8 as well, and although that is a far cry from older versions in terms of troubleshooting and features, I still prefer the tools Mimosa is providing. If you put up a Mimosa link and it doesn’t achieve the advertised speed, you will find it far easier to figure out why.