Just to give some positive heads up. It's not all as bad as others write. At least not on my fleet.
With 787 fleet things start to get going quite ok.
We get now monthly roster, averaging 50-60h a month which pays close to 10k usd net. Plenty of free time. Of course 10k is well below the market but that money can give a good life in VN while waiting for the market to improve.
Operations might be messy but flying for Bamboo is super relaxed. Vietnamese very friendly.
Regarding the release letter you can get one the next day provided you pay the notice period. Otherwise it goes pro rated. No problems with that whatsoever.