Jellied Cranberry Sauce

I tried several different recipes for making Jellied Cranberry Sauce - they all failed to "Gel up" properly, and then I found this recipe. Its the only one that actually works.

Jellied Cranberry Sauce
Ingredients
INGREDIENTS 4 (12-ounce) bags cranberries, thawed if frozen
3 cups sugar
3 1/3 cups cold water
3 envelopes unflavored gelatin

Directions:
Bring cranberries, sugar, and 3 cups water to a boil in a 4- to 5-quart heavy saucepan, stirring until sugar is dissolved, then reduce heat and simmer, partially covered, stirring occasionally, until all berries have burst, 10 to 15 minutes. Pour into a large fine-mesh sieve set over a 2-quart glass measure or a bowl and let stand until all juices have drained through, about 30 minutes. If necessary, press on solids until there is enough juice to measure 3 cups, then discard solids.

Stir together gelatin and remaining 1/3 cup water and let stand 1 minute to soften. Bring 1 cup drained cranberry liquid to a simmer in a small saucepan, then add gelatin mixture and stir until just dissolved. Add gelatin mixture to remaining cranberry liquid and stir well. Pour cranberry sauce into lightly oiled mold and chill, covered with plastic wrap, until firmly set, at least 12 hours.

To unmold, run tip of a thin knife between edge of mold and cranberry sauce. Tilt mold sideways and tap side of mold against a work surface, turning it, to evenly break seal and loosen cranberry sauce. Keeping mold tilted, invert a plate over mold, then invert cranberry sauce onto plate.

Note:
For cranberry orange sauce, replace 3 cups of water with orange juice before boiling.