I always order delivery from them, not because their food is great but because they are the only Chinese restaurant that delivers and taste acceptable around where I live. I always tip the driver 20% or above until lately I was having an important phone call when they delivered and forgot to tip the guy. I was told on the phone that I need to tip the driver the next time I called them. I said Ok and apologized, explaining I was on the phone that's why I didn't tip the driver. And I did tip the driver this time. However I FOUND A BIG PIECE OF EGG SHELL AND A PIECE OF HAIR in my food. This has never happened before so I dont know if they did it on purpose or not. As far as I remember tipping is OPTIONAL, and you should never throw egg shell and hair into other people's food.