Best Hotel Price Tracking Service/Tool

[HoKo]

I am looking for suggestions regarding hotel price tracking tools. Specifically, I recently made a refundable hotel reservation for a stay in December, and given that there is quite a long time in between now and then I would like to monitor the price and rebook if their rates go down.

The two services that I am already aware of that provide this type of functionality are Pruvo and HotelSlash.

Are there other ones that exist?

What do people think of Pruvo and HotelSlash? (I’ve been using AutoSlash for years but haven’t used HotelSlash yet).

[HoKo]

Found another one: https://www.rebookey.com/

[HoKo]

This thread hasn't gotten any traction but I think people should be paying more attention. HotelSlash alerted me to a rate that was ~$700 cheaper than what I had paid (on a ~$2,000 booking).