Just opened with ArubaBank. Yes they are very restrictive when it comes to required documents, so make sure to supply everything.
Only thing that they might be more easy on is that if you only use one bank, they probably will accept only one bank letter.
Even when you have given them all the paperwork and signed another bunch of papers they will even want to know where deposits to the account will come from and also what how often and how big amounts .
And then you have to wait several days for their commitiee to approve you.
It seems crazy in a modern world that they need all this paperwork and signatures, but on the other hand they do it to limit criminal activities, so its ok for me, and only have to be done once.

Carsten