I've stayed there a few times. Once in a mini suite and once in a 2 queen room (but as previous poster said, more like double than queen). We've always had a great experience there. I have a 10 yr old and never felt that we were in any way discriminated against. The free breakfast is only for certain room types, I believe it's offered with their new concierge king rooms. So we have never experienced it, but I have heard others say the same thing, that they were limited in what they could have and had to take it to their rooms.
My only complaint about this hotel is the distance. We never wanted to pay for ART, so we would walk. We tried 2 different routes and still can't figure out if one is quicker than the other. But it does take about 20 minutes to get to the gates. You can either walk down Katella towards the Convention Center, cross over at the pedestrian walkway, enter the Lion King parking lot, walk about halfway through it, where you can finally catch the tram. That is if the tram is running that day. Otherwise you keep walking up to the front gates. The other option is to cross Katella right at Disney Way, heading towards Downtown Disney, cut through the Grand Californian into Downtown Disney, then on over to the gates.