In short its the most mature, fastest (in terms of efficiency, cant compete with aros when aros is running on machines much, much faster obviously), most compatible "NG" amiga OS around. The only things to bear in mind is that it is an amiga os based system and therefore is lacking software wise compared to more mainstream oses, (although that's always the case with alternative systems and unless you have very specific needs shouldnt be a big problem), and that even on the fastest hardware it has available wont run a lot of demanding aga stuff very well using euae (no jit cpu emulator for ppc and not a problem with mos)
