Actually the OP said he is entering the arrivals lounge based on status? So I presume he is a BA Gold or PRemier (as these are the exception cases whereby they can use the arrivals lounge).

I actually really liek the BA arrivals lounge, but do note the opening times. Also breakfast is stopped after I think 1130?

The CX F class lounge is pretty good. IMO better than the T4 BA F Class lounge.

The dim sums are just MSG loaded frozen Amoy brand, but for some reasons I find them to be good (as I find most WESTERN countries lounges, do not provide hot food, and this is most welcoming). The salads are not bad and the sandwiches and noodles are decent as well.