I used a LOT less salt but otherwise made as directed. The procedure in the recipe resulted in a perfectly cooked roast. Be sure not to skip the step about allowing the roast to come up to room temp, you may have to allow for 2 or 3 hours for that.
I used only a quarter of the salt indicated and that was just right for me. Used fresh garlic and next time might even use more than indicated. The roast was perfectly cooked and just delicious.
As always, I loved the simplicity of this recipe. I would not add so much salt, don't feel it necessary. I did use the fresh garlic.