Just a heads up on the Digital Hotel in T3 as I've stayed there twice already.
Pros:
1) Convenience - especially now with the airport tram that goes to T1 and T2 so you don't have to deal with the shuttle bus fiasco anymore.
2) Plenty of options to eat in the T3 departure and arrival area.
3) Clean - It is new (opened last May) so everything is still in good condition. You also get a locker with towels, toiletries, and slippers.
4) Comfortable - If you are not claustrophobic, then you will be fine. The capsule has a TV inside and the internet is quite fast. All the basic creature comforts you need, you will find it. But if you are 6'5' or taller and a bit on the heavier set, then it might be a bit uncomfortable.
5) Cheap - The new rate should be less than $30 USD. Last when I stayed with them, I paid around $300K IDR for one night. They also have the 4hour/6hour/8 hour/12 hour options if I recall correctly.
Cons:
1) It does not have it's own bathroom/toilets. So you will be sharing that with the airport staff in the staff bathroom/toilet area. It's at the end of the other side of the hotel and make a right when you exit the door and it's on your left. There are only 4 bathroom/toilet facilities so it might a bit occupied from time to time.
2) Noise - There is no such thing as soundproofing for the capsules hence you can pretty much hear everything around you. Common area etiquette in most of Asia is an after thought hence if you are a light sleeper like I am, please prepare a set of ear plugs.
3) The capsules are stacked two high so you can feel the shake and rattle if you're at the bottom capsule while your neighbor on top goes in and out, up and down via the ladder.
4) The luggage(s) is/are kept in the common storage room, which is the staff office. So make sure you have a luggage lock to lock your luggage and take the valuables with you and put it in the locker. The locker is big enough to fit a 26" carry-on.
Overall, I still recommend it. Both times I stayed at digital were because I had night arrivals from Palu. Given the airline record in Indonesia, I did not want to risk booking at return flight on the same night. I decided to stay one night at the airport and take the early morning flight out the next day. I did not have to deal with the airport car traffic and it took 10 min walking from my bed to my check-in counter.