Visited for the first time recently for a friend's birthday. Service was quite slow, as there was a huge birthday party in (of at least 25) and the vast amount of effort went in to serving them. Our drinks came after about 4 dishes and the servers just plonked them at the end of the table rather than handing them to the person who ordered it. I understand it's dim sum but there are too many plates and baskets - servers took quite a while to clear them away too.
Food was quite nice but it's SO DARK in there we had no idea what we were eating (not explained what each one is, just said 'part of this/that set meal' & walked away), & the servers had to really look at their notes to figure out what they were delivering! The food was quite nice and you don't expect to get full on the amount you get!
Whilst we were a group of 6, on their website it says they add the service charge to the bill regardless of size, which I HATE. I work in catering so I know how poorly paid it is, but you shouldn't assume the service you offer is perfect and make everyone pay the full 12.5%. Our service was not brilliant. 5 of us split the bill and 4 paid by card - we were due around £5 back from the other persons cash and waited for around 10mins but it never showed up. All the staff honestly seemed to have disappeared! So I probably wouldn't go back just because I was effectively stolen from...!