It's very addicting....and yes...it's harder to level up since it's designed to be played over a long period of time.

At the beginning, anything you kill gives you EXP, but as you grow stronger, that same enemy will give you nothing but occasional items that can be traded or sold for $$$. You'll need a lot of patience playing it too. Freaking aye....money is tight. Prepared to be broke at the beginning of the game. Also, whatever you do....try NOT to die. You lose experience points when you die. You will also be level downed if you die too many times.