I've done KL overnight using Air Asia. First flight there in the morning, and then an evening flight back the next day. The pickup time when I was there was only around 10 minutes.
Hi David. I got a 60 day visa in KL in July - it's really straight forward - there's no need to use an agent.
They wanted to see flight bookings into Thailand and onwards, as well as proof of lodging here, and their completed and signed checklist along with the visa application form and cash. No financials required. Arrived 9:30am on the Tuesday and was done in around 30 minutes, picked up at 2:30 the next day - was in and out in 5 minutes.
Yeah they can provide all the supporting documentation - that's no problem. Just wasn't sure if they would also need to see my degree as part of the submission process.