I've been coming here for years and you know what - I've still never tasted better dumplings. I've been to various dim sum places, japanese or chinese places and even Mr Dumpling in NY but still these are the best.
The thing is that most places make Gyoza whereas these guys make Guotei - I don't know what the exact difference is but the dumpling pastry seems whiter and lighter and you know what - just so much more delicious. It could be that this place serves Northern Chinese whereas most places seem to be Southern Chinese - but seriously the dumplings are to die for and well worth the slightly expensive price of £5.80 for 6. They come in pork, chicken, fish and veg.
Oh and also the crispy noodles with chicken is awesome.