Actually, a deeded HRC week is like a cross between an HGVC week and a deeded Marriott week. I think it was the best system out there but never grew to have many locations, and now they are moving inventory into HPP.
You can buy a specific unit in a great location (say Key West in a unit in the front building overlooking the ocean). You have an exclusive right to use that exact week in that exact unit (like a deeded Marriott week, except you are guaranteed a specific unit/view). Or you can just use the points like HGVC (which is what most do).
The number of points needed for a reservation varies by unit size and season.
For HRC inventory, you can book 7 nights, 3 nights weekend, 4 nights midweek or 2 nights midweek. The week is divided that way, and it controls the checkin days. Saturday alway is more expensive and included in the 3 night weekend regardless of Fri, Sat or Sun checkins. The 3 night weekend is essentially double the points of a 4 night midweek (it varies by season). For example, for a Sat checkin the 3 night weekend is Sat-Mon and the 4 night midweek is Tue-Fri. The 2 night midweek is either Tue-Wed or Th-Fri.
At 6 months out you will see HPP (the points boondoggle) inventory and that is more flexible that the HRC week setup. Saturday is again more expensive but skewed - they treat Su-Fr as approx half of the total points and Saturday the same amount as Su-FR. So this is a sweet spot. The amount of HPP inventory is not great but is good in some places.
Sunset Harbor in Key West and the Maui property are hard to get into, but you can use waitlist for HRC inventory.