We love that hotel. We've been staying there everytime we go to
Disneyland for the last few years and have always had a great experience. Last time we went to Disney in August for the Disneyland Half Marathon weekend, we decided to give the Residence Inn Maingate a try. I didn't like that place quite as much. It was a little older, our room seemed poorly lit, we had constant bugs in our room, and the a/c never worked.
I would definitely recommend the Garden Grove location, though! I just booked another reservation for there for next month.