It's not as hard as I would've expected from the honors class, but it still is difficult. There's a bunch of stuff that's useful to know for physics 110ab (if you're a physics major), and it's really heavy on math. Take math 32b before if you can. The regular physics 1b doesn't cover things like special relativity and Maxwell's equations. Attendance was mandatory. We had weekly homework problems, two midterms (averages were around ~80% and ~70% if I remember correctly), and a final.

If you just want to take this class because it gets curved a lot more than the regular class, probably don't do it. Even if you're an EE major, I don't think this class is more helpful than the regular one for that subject. But if you're really interested in the physics, it's very fun!