I've used the one from Monoprice, and this model appears to be nearly identical. Forget the pretty box, this is about as cheap as HDMI over CAT5 extenders could possibly cost while including 1080p video. The one I got from Monoprice does not list 1080p support as an option.
This really is a good price on a product which I have not had dealings with specifically, but if it matches up to its own specifications, it should be excellent.
You can always just use a regular HDMI cable if you run is short, but for retro-wiring where space is tight, and for longer than 50 foot runs, the CAT-5 solutions really seem to be the future. I would really love to see an HDMI specified standard for CAT-5 extenders that would allow displays to simply have CAT-5 inputs right on them.