Amberstar was one of the first and one of the best rpg i liked and played for many many hours till i finished it,it had some flaws sometimes but it was good.
Ambermoon was good i tried to play it,but had some fatal bugs,you need a special version and somethings to have in mind in order not to mess it up with some bugs that can make the game unsolvable.
Still ambermoon is one of the best rpg and one of the first to have a kind of 3d texture mapping even on 68000 based amigas.Sadly when it was about to be released amiga was dying as platform so the last part of the trilogy was never released i think.