Great stay at Ibis Styles Sepand Klia. I only had a day there, but the room was nice and the breakfast variety was really nice as well. The shuttle is a great plus.
For reference, if you want to go downtown, I paid 75MR for a grab and it took around an hour and ten minutes on a Sunday afternoon and then paid the same to come back from KLSS, but the street food and walk around downtown were definitely worth it.
The only two issues I had for my stay were: One of the doors didn't shut to the exterior of the building, so it buzzed for quite awhile at about 6am. Finally, I got out of bed and shut the door. The only other thing to be aware of is the room takes awhile to cool down and the washroom is the last thing to cool off.