Yes, MS390s have a lot of issue even today, however, they support SGTs, which is why we went with them. Recently built one of our new offices with 20xMS390s and 80xMR57 with dual port aggregation enabled to two different switches. The main problem I have found with the MS390s, is the stacking. It works well until there is un update. I have mitigated this by building Core-->distribution--->access switch, with fiber links from each switch to distribution, even though the switches are stacked in threes. Anyway, about the WiFi, our network design are WiFi first design, switches in use to create links for APs and other wired infrastructure. The MR57 does have a higher DB antenna, but then again, the difference is minute, and don't think it is really worth worrying about. I guess the additional features are a "nice to have" and maybe I will just go for the more cost effective solution between the two or even three, if I consider the CW9164 I will take another look at the design to make sure if I lose 1 link to an AP there will be good overlap from other APs to cover the areas Thanks for the feedback
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