Very well made game in my opinion.
I'll say for now it probably is best that you just get it later. At this point, the game's 90% done in the sense that there's lots of bugs or annoyances/things missing from the game. I'd guess that the game will be all good in a few weeks.
Aside from some of those gripes though, I definitely think, and this is after playing just about every major/decent mmo on the market, that AoC is the first next-gen feeling mmo and will likely continue to grow in content and population and will likely last a long time. As of the first week, over 400,000 people subscribed to the game.
There's also really strong end-game content in AoC. There's a wide array of dungeons and raids to fight through as well as your pvp mini-games (ctf, tdm), but biggest and maybe best of all is guild content. Guilds can build up their own keeps, temples, trade posts, barracks, walls, towers, etc., and ultimately make their own city, which provides exclusive things to members of that guild that no one else has access to. There's a limited amount of spots that cities may be built in on each server, which leads to a great gameplay feature called siege warfare, where guilds may invade other guilds' cities with infantry, catapults, war elephants and rhinos, and attempt to raze and capture that city for themselves.
One more note, is that this game does use zones and instances. It isn't seamless like WoW (and what games are, anyway), and you will encounter load screens between regions. It's not nearly as extreme as Guild Wars, but it is obvious nonetheless. On a personal note, I don't find the system bad or gamebreaking. It prevents overcrowding on quest mobs and resource nodes and spreads out players and the area they're playing in so you'll encounter eachother so it won't feel too overcrowded or too underpopulated either.
So...yeah, I'm done now.