Google Maps has streetview the whole way. WSDOT has a number of traffic cams. There's also some paving work at the west end (around the town of Snohomish). Traffic can be heavy in the Monroe to Gold Bar stretch, with commuters and vacationers.
The main grade east bound is the final loop before the summit.
The stretch through Tumwater Canyon (before Leavenworth) is relatively flat but twisty as it follows the river. The passenger will enjoy the views more than the driver.