I was doing research for San Diego too, and although Comfort Suites sounds like a great deal, the reviews on Trip Advisor turned me off. I'm planning on staying at the Residence Inn Mission Valley/Seaworld which is on Hotel Circle. They get really good reviews on Trip Advisor, but it's a little more pricey. They have two-bedroom kidsuites with a full kitchen, free hot breakfast buffet, and complementary manager's reception.