Hardly. We haven't used the resort monorail in years and stay at the Poly every year. The edges are the views, location (easy path access to GF), the resort launch to MK (much more fun than the monorail), easy access to Epcot, and overall ambiance. If you're staying at a monorail resort just because of the monorail then you shouldn't be there. Besides, the monorail is far more reliable than people on here say. We watch them from the balcony and they run quite reliably actually but it isn't popular to say that on a Disney board.