Are these things any good?

I'm thinking of installing my base stations in living room with wall mounts because I have the most space there, but I was thinking of getting something like these so I'd be able to set things up in my bedroom since my furniture layout means I could put one on my desk and one in the corner by my bed and not really limit play space at all due to things being in the way anyway. 
And also could be good if I wanted to bring my system over to a friend's or something, yeah?