Wow...what's so good about GW? Easy and hard to answer at the same time. Depend on your mmo back ground, I guess.
GW is user friendly, low lv cap, skills base rather than gears, no monthly fee (need to buy the game itself though), great graphics, mid range pc will run it just fine, optional grind, fun pve, good pvp (no pk), max lv gears are easy to get.