So far I've done 2 washing+waxing & 2 times of washing/vaccuming @CARS, so far so good but of course it's not perfect. 90-95% is clean compared to roadside car wash which might result in 70-80% clean only.
I agree with most of you, a long wait is anticipated if you send your car there during holiday/weekends or after office hours. I went to 1-U once during last week of Dec last year when many were on leave. The waiting required was 3-4 hrs according to the person attended to me. Then I just drove away.

Try the one at Empire, Subang. It's not bad & Q is shorter. Maybe it's new & not many know there's CARS there.

Still thinking whether will renew mine ... hmmm another 6 mths to go ...