There's so little to these things its hard to say that they're made of cheap materials. The ports are about the only things that sees some wear and tear and they seem pretty solid. Once you get it in a setup I doubt you be moving it around often. Its like like having to plug up your phone everynight.
The only slowdown I notice is when you are downloading or buffering a movie, my air mouse gets pretty laggy. It may just be my poorly made air mouse too.
