It works great, but its also the most boring tactic ever to use with samus if you are using it the whole game T.T I find being on the ledge cuts mindgames down a lot and focuses the game more on reaction to the other player's position, which, like I said before, its great if you want only to win but pretty horrid if you want to compete. (or prove anything tangible from the match)
edit: to put it bluntly ^^... using this tactic against someone who can't respond to it justifies everytime a DDD has infinited you for a match.