I can only speak from my limited experience, but I just recently purchased the 51NH model and it worked beautifully for me. OoB support for everything BT5r2 can do. I chose this particular one because it is the only ALFA I could find which was listed as providing a 350Mb connection in the N spectrum. While there are devices which mention that they can provide a 2000mW signal, I really don't see the point. Max power for any AP is 1000mW which is what the 51NH provides. Highly recommended!