Angels is a great climb that some folk have a really unpleasant time on. Here are some tips:
Know how to climb cracks.
Don't do it on a hot day.
Take water.
Make sure you start at the correct crack, which is on the left side of the buttress.
Tape up (unless you're a granite crack expert).
Wear solid boots (not slippers).
Take lots of gear to #4 Camalot + slings.
Start early to get to the front of the queue.
Enjoy.
It has been done in 2 hours including walk down, but you'd best allow a full day.
If you're unsure of your ability to enjoy this route, try Devilled Cream as a warm up.