Watching over-the-air TV on a notebook computer

THIS ONE or a similar product is what I was thinking of. Our Roadtrek has a fairly decent TV antenna in the fiberglass roof that has worked well with the old CRT TV set and digital converter box. Hopefully, good TV reception on the notebook and the ability to record would make the proposed setup superior (and a lot lighter!) than our present arrangement.

Before I plunk down the money for the TV tuner, I'd be interested if anyone has this or a similar tuner. Thanks in advance.