worth it. actually os2xl is worth it. if you a chopping mutha **** than its the best thing you could ever do. if you just sequencing external gear, maybe it aint worth it.
why dont you just install jjos1 and use it for a bit before you buy a password... after an hour or so of use i knew JJ was completely superior to the akai os.. ive yet to try os2 but im fine with os1.. although i want the adsr