It's lagless for me but my PC is pretty good etc.. I don't think you need a good a good pc to run it, maybe check your pc for spyware, viruses or upgrade :P
Hmm the game is pretty fun I guess but I don't play it anymore because i'm playing something else I enjoy more.
The sprite system is really great to play with and the game itself is pretty fun, I can't comment on it being a grind fest because I only reached lvl 20 myself lol.. But there are alot of quests you can do and repeatable ones. Maybe later in the game you will need to grind a bit.
As for the cash shop it is an Aeria game so there is indeed a cash shop which is rather overpriced but you can play the game still without the cash shop.. Maybe later in the game it will come more dependent on cash shop.
Have fun!








