I ordered delivery through Yelp! It came incredibly fast - way faster than the estimated time and my mom and I totally appreciated that!
Eh. It didn't really hit a homerun with me or mom. We got the Sweet and Sour Chicken / Honey Chicken deal and the Grilled Boneless Spareribs / Chicken on a Stick. It seemed like a really good idea, but the amount of food was disappointing and the taste was lacking.
If I were in a pinch and wanted something delivered fast, I'd potentially consider Wai Wai again to try something else on their menu...but that's kind of a maybe.