Tried SPC in part based on this thread, which I read while sitting in the disappointing KE Prestige Lounge (East). Food in SPC is good and with many options - I enjoyed the self-serve udon - as is the cleaniness and service (unlike the KE lounge someone actually came around to clean off the tables frequently), though it was also louder and busier feeling (for part of our visit - it cleared out around 9:30 a.m. and there were almost as many staff as patrons) so I suppose it is a matter of what you're looking for and when you are there. The nap room is next door and there's a nice garden area below if you're looking for calm.