FRA-CAI-DXB / KWI-CAI-FRA. FRA-CAI leg on a modern B737-800 with good legroom and decent food. 3 hours time to transit in CAI with the boarding pass for the continuing leg only available at the transit desk in CAI. Star Alliance Lounge in CAI is ok however quality wise way below other Star Alliance lounges. CAI-DXB a new 777-300ER with lie flat seats. KWI-CAI on a 20 year old A320 very tired plane. Last leg an A330-200 old style business class recliner seats with excellent legroom. Problem is that the product is not yet consistent in terms of seat quality offered plus the older planes feel a little dirty. Biggest problem for MS from my perspective is the staff that is not friendly at all. A smile does not cost anything but can make a big difference.