Originally Posted by setaylor
I mounted mine vertically but did notice a signal drop. It's hard to position the antennas optimally, or maybe I just never got it right. YMMV.
I've had my router vertical, using the stand, since I bought it, it runs cooler that way. And it takes up a lot less space. Yes, you do have to play with the antennas, which isn't too hard using a laptop with inSSIDer or an Android phone with a network analyzer app. I'd be surprised if you have the antennas positioned optimally for both router orientations, vertical and horizontal, and saw a difference in signal strength due to router orientation.