We were in and out of KL a couple times due to flights to other places and this is a fabulous airport hotel. (KL also great, but have explored before). An AMAZING breakfast of countless food varieties (pan Asian, Euro, American, etc).
They do offer an indoor shuttle service via golf cart type rigs and even we, with small roller bags and being avid walkers, hopped on. It's a long ride....
All staff were amazingly helpful and friendly. We'd stay again anytime.