I never played the 1st Grandia, but I had Grandia II on the Dreamcast and I absolutely loved that game. I'll admit that I was never the best with (J)RPGs and never played it for that long per-session as a kid, but I did eventually finish it. Though, it did take many years to finally get to the end and finish the game, but I enjoyed it! (I also enjoyed Evolution 2: Far Off Promise).