This CHINESE blog has nice details of the lounge
臺灣桃園國際機場~第二航廈~長榮航空The Infinity貴賓室 @ 三本財與小豬豬 :: 痞客邦 PIXNET ::
http://infinite520visa.pixnet.net/blog/post/151612542
I used The Infinity the other day as Business pax & brought guest with my *G card
The food is decent
I think The Infinity only differ from The Star in that The Infinity shower rooms has toilets inside
I saw the outside of The Club, it was fancy