I think I stayed in this hotel for 5-6 times already, either solo or with friends.
Breakfast: never had them, we usually skip this as one of the primary reason for Disney visit is food
Room: always clean, but thin walls and lots of gaps around the door. So you'll hear lots of noise. Loud too, like "might as well leave the door open" type of loud. Also tiny pillows
Service: staff are nice and will respond promptly when needed. However on our last visit, the housekeeping still cleans the room even with "do not disturb" sign on the door. And they didn't close the door properly so it was partially open when we got back from Disneyland at night.
Neighborhood: VERY LOUD. If you stay on the rooms facing west, you could hear cars revving at night. But lots of eateries around the area. Joes Italian Ice is just like 1 minute walk from the hotel (and if you've been there, you know the struggle of finding parking).
Transportation: THE primary reason of our stay. ART stop right outside the hotel. I've stayed in different hotels within walking distance from Disneyland before, and by far Stanford has the shortest hotel-room-to-park-entrance walk because ART bus does the majority of the work to move you from point A to point B.
Its an older property and gotta admit, not the best one in the area if you're looking for something less noisy. But if you want budget friendly hotel with convenient access to Disneyland Resort, this is about as good as it gets.