It's 1:1 to what the real WotLK felt like, and it has a friendly community. I know people complain about fake population numbers on the website (which might be true?), but the game does feel alive, you often meet other players of low levels in leveling areas and there's always a dungeon you can find quickly at any level. Stable server. Have had my characters on there for a few years now - you don't need to quickly speed through the content in the fear that your progress may be reset soon; they have a dedicated realm for that, it being Frostmourne. Will definitely recommend to experienced players and newbies alike!