as a boarder, not too big a fan of heavenly... the longer runs require you to travel across the entire mountain (too many congested catwalks filled with noobs)... plus, for some odd reason, this resort's gondolas close very often due to heavy winds.
all that aside, I'd say it's a good "warm-up" location for tahoe.
Between the Vail owned tahoe resorts, Northstar and Kirkwood are definitely my favorites. Here's my ratings of them:
Wish I could say more about the rest of the tahoe resorts, but those are the only 3 i typically go to