The answer to the "is it tough enough" question is the lengthy par 4's and the really good par 3's.
Par 4's #3, #5, #7, #9, #16, #18, are all in excess of 400 yds and play longer as #3, #5, #9 and #18 all play uphill. I've made more 4's on the par 5's over the years than on #3, #5 and definitely #16, a world class par 4. The course is so subtle, with the best angles to most green sites requiring tee shots close to the ravine which runs all the way through the course.
The short par 4's are challenging. #6 has a narrowing fairway but is short enough that you are enticed to pull the driver. The green is among the most tilted and contoured on the course. #12 has a hillside of death left, a deep ravine right, and a tiny green set in a narrow area. #13 is mid length with a semi blind up hill approach. #17 is a shortish dogleg with a tiny angled green and OB dangerously close on the left.
The set of par 3's is great. None requires more than a mid iron, and #4 and #8 are both short irons. But the targets are small and well protected. #14 is a first rate 175 yds across a ravine from an elevated tee with the first fairway and clubhouse in the distance directly behind the green.
The course starts with two par 5's, so like Cypress Point, the par 5's are just about done after #10.
Bob is right, the golf is very low key, no caddies, pull carts are fine (including Freddy Couples who has been out there several times during my annual visits). All in all it is my favorite place to play golf. The weather isn't bad either!