It's pretty tough to find decent Chinese in Scottsdale. Jade Palace is an ok option if you have a serious craving for Chinese, but rarely will you think "Gee, let's go to Jade Palace to get some quality food".
The food is mediocre at best. Nothing really stands out on the menu. I've been a handful of times because it's so close to where I live...each time I get something different hoping for the best. Each time I walked away thinking I should have spent my money elsewhere.
If considering Jade Palace, ask yourself this:
Do I have a serious craving for Chinese that wont go away if I eat anything else? Do I live within 5 minutes of Jade Palace? Do I like dining with people who average 85 years old?
If yes, go. Otherwise move on...