I think best part of tripadvisor is the "user photos" of the property. It gives good current information rather than looking those expert photographers pictures on the website of the property which are 10-20years old.
http://hotelandtravelindex.travelweekly.com/ seems good when it has the property on it's database.
I sent feedback to the hotelscombined and this was their answer:
Hi J,
Thank you very much for the feedback.
We're overhauling our hotel descriptions very soon which will include much more detail about each hotel.
We're also constantly improving the way users can filter search results and will take this on board.
Kind Regards,
Sara