If you aren't expecting a gourmet meal (why would you be?) then you shouldn't be disappointed.
The obvious comparison: Mandarin. I will give the slight edge to Mandarin in the food quality/taste department. Decor/ambience...well, they're both buffets but Mandarin gets the edge here easily. The biggest difference, to me, are the staff. Mandarin servers/greeters/et al are much friendlier, more outgoing and pretend to actually be pleased to see you patronizing their workplace.
The surly attitudes at Imperial need to go. Nary a smile to be seen from their servers. Ignore you when you thank them for filling up your water.
Food wise, there is much more selection at Imperial, but it seems the selection comes at the cost of taste. Again, I'm not expecting a gourmet experience here but the dishes are just...meh. Nothing mindblowing, but not gross or offensive in any way. They do keep the stuff pretty hot and fresh at least.
Sushi is usually surprisingly good considering it's a Chinese buffet.
Desserts are all obviously storebought. I am a fan of the waffles though (they make them way too slow at Mandarin and there never seem to be any!)
Parking is easy enough, though Tuesday evenings can be a bit of a headache as it's right beside the theater.
To sum up...if this location closed, I'd happily welcome a different buffet in it's place at a similar price point. But it gets the job done for now when the family is in the mood to pig out on "Chinese food" for slightly cheaper than at Mandarin.
Definitely check it out if you get the buy 1 get 1 free coupon!