I'm going to start by saying it was pretty good in terms of a place to crash between flights, but there were so many little things that could be improved with a tiny modicum of thought.

The "industrial chic" design inside shipping containers means that there is a lot of hollow metal which dongs sonorously every time someone touches it. It's a bit late to fix but....

I'm grateful for the succession of security doors, but is it absolutely necessary they should open with a beep? And clang shut? Disconnect the buzzers and pad the door frames!

The "capsule" is a metre square plywood and steel box, 15cm bigger than a standard single bed mattress. It was scrupulously clean and the bed was really comfortable. A roller blind created privacy. There was a drop down "table" but it dropped so far nothing would stay on it. There was a single plug socket, but in between flights I had multiple things to charge. Just an additional USB port would have made things much easier. There was a built in box for valuables if you were the sort of prepared traveller that carries a padlock with you.

The luggage lockers are OUTSIDE the secure sleeping zone, so don't forget anything because otherwise you'll find yourself lugging your bags around in a fairly crowded public place in a towel.

The lockers were pretty generous and they had extra storage for additional or oversize cases.

I liked the shampoo/shower gel dispensers in the shower but don't understand why there was nowhere to hook the shower head up. You had to hold it all the way through your wash. There is only one hook inside the cubicle. I was juggling the clothes I was taking off, the towel, and the clothes I was putting on (along with a pair of sneakers) and trying not to get anything wet.

They must have some deal with the mattress company because there were adverts for them everywhere. If I was in a position to be buying a mattress in KL, I wouldn't be staying at the capsule overnight! The adverts all had super unhelpful suggestions on how to get a good nights sleep. Nowhere did it say "Don't fly across 9 timezones".

They gave everyone a bag containing a towel, a disposable toothbrush and a bottle of water. There was nowhere to refill either it or your own. Tea or Coffee on the premises would have been very welcome, but was also sadly not available.

Finally to the thing that really dragged this review down for me. There was no useful information that people who were breaking a journey might like to know. Which airlines fly from which terminal? How long does the shuttle bus between terminals take and when does it run? Where do you catch the KLIA express or the bus to wherever? Where might be open for food at 3am? The staff didn't know anything useful and said "we're a hotel, not an information counter." Having stayed at similar flop-shops at airports all over the world I thought that was well below the bar.

If I'm passing through again, for the money, I'll stay at the tune hotel. It's only 100m away and the doors don't beep.