Interview was a full 4.5 hours (right through lunch, with no food--good thing I brought something to snack on). Lots of practical stuff, good amount of time on the whiteboard, but nothing outrageously difficult. HR representative received me initially, and printed out a schedule and packet about the company, and who I'd be meeting with (mid way through that changed, too). She was very friendly, as were most of the folks. Overall, I thought it was a fine experience.

I spoke with 9 different team members at Shutterfly. The interview process was very well-organized. The interviews ranged from fairly technical to generally business oriented. The company culture is close-knit and collaborative. The organization is very much matrix-oriented, with product management separate from engineering. I'd advise a technical job candidate to focus very much on tech execution and a product management candidate to stay away from strong technology opinions.