I'm planning a hotel stay in mid-March. I've tried to find a website, app, or whatever that will monitor rates for a certain hotel I've been eyeballing for a certain date and email me if the price changes (either up or down). Kayak's tool for this seems to be useless, it emails me every day even though the price hasn't changed. I've signed up for the one on Hotels.com but it hasn't sent me anything yet because the price hasn't yet changed (and not sure when or if it will).

Is there a useful tool out there somewhere that will do this reliably, or is the one for Hotels.com any good?