My husband and I have had 4p encounters involving three other ladies here on TAG in various combinations. We have also had 4p sessions with ladies outside of Japan and I will say, the 4p experiences with the ladies on TAG by far exceeded the other 4p sessions.
I feel since the ladies on TAG are either friends, seem to genuinely like and respect each other, and enjoy playing together, then these factors add to the chemistry which made the experience extremely fun, at ease and quite memorable. Whereas it can be somewhat awkward when the ladies might not know each other or are not as familiar with one another.
When the chemistry is perfect and in sync for everyone, that makes the experience priceless, extremely rare and truly special imo.