how to use Hotel Canary

If you are totally risk averse - this is NOT the method for you.  The purchase is nonrefundable.  I've never known Hotel Canary to be wrong, but it might be.  You have to be okay with getting a different hotel.

To find onsite Disney hotels as a blind deal.
Open Chrome.  This only works on a computer and only works on Chrome.
Click the three dots at the top right (under the X to close).
Hover over More Tools and then click Extensions.
Click Extensions on the top left side.
Click open Web Store on the bottom.
Search for and add Hotel Canary.
Go to priceline.com and click Search Now under the Have you tried Express Deals ad.
Enter Lake Buena Vista, FL and your dates.  Then click search.
On the left toolbar, check the boxes for Walt Disney World - Disney Springs and Walt Disney World - Bonnet Creek.
Make a note of how many reviews the listing has and what number rating it has.
Click Choose next to the option you are interested in.
Click Book. (Ignore any hotel suggestions on this page.)
Click the Hotel Canary icon (looks like a rock, but I think it's supposed to be a bell that would be on a hotel check in counter).
Then hover over where it says 3.5 Star Hotel (or whatever star level you picked).
The possible matches will pop up in the right corner of your screen. 
If there is more than one match, compare the rating and number of reviews to narrow down your choice.

Again, this is not a guarantee.  I haven't known it to be wrong, but there is a chance it could be.