In the US Poseidon regulators have a reputation of being difficult and expensive to service. It is claimed that parts and qualified technicians are hard to find. I don't know whether this reputation is deserved. They seem to have a much better reputation in Europe. A couple of pointers. First, you really shouldn't base your gear selection on "coolness". There is much "cool stuff" that is junk. Second, regulators generally don't break down and when they do it is usually after a service. Usually performance degrades slowly over time but there are exceptions.
In Singapore it's not really an issue but I'm not sure if getting it serviced in Thailand, Indonesia or Malaysia would be as easy.