Was here for a group dinner as this is one of the favourite restaurant of a manager in which I work with. We were a large group (nearly 20) and not everyone seems the most enthusiastic about the Mandarin.
The good: Huge selection of pretty much anything you desire to eat.
The bad: Lots of unhealthy fried food with smaller selection of vegetables and bigger selection of the stuff that will expand your waistline ten fold.
I tried the sushi as a starter. Last time I ate here (probably 5 years ago) the sushi was pretty bland and sub standard quality. I was somewhat surprised that the quality was better but the selection was pretty much "beginner sushi". Next plate was a mix of some noodles, fried food and veg. Food has flavour but seems a bit more bland when it's on a buffet to me.
This place is clean and if Asian buffets are your deal then serve it up!
For me it's just a so-so!