An awesome MMO, definitely worth getting even if you have Prophecies already.
First of all, NO MONTHLY FEES. There is no grinding what so ever. To get to the capped level just simply do the quests and missions, no need to camp a certain spot and kill the same dudes over aaaaaaand over.
This game is awesome because, instead of your level determining your usefulness to the team, it's all about how you set up your skills. You can only have up to 8 skills out on a quest or mission at a time, so think carefully. But don't worry, you can change your attributes and skills anytime you are in town. Don't ever worry about ruining your character, you can switch to any build anytime you are in town. This game also is very great because of the travel time. Once you have been to a town, you can travel to it anytime when you are looking at your map. You don't have to worry about spending 10-20 minutes just to get back to a town.
The character classes are great, there are so many ways you can combine two classes. The two extra classes are great too, (assassin and the ritualist), I personally love the ritualist.
A great part about the game are the missions, it's kind of revolutionary to the MMO genre. You get into a group in these towns meant just for the missions. Once you start them you can't change anything besides your equipment until you are done. The PVP is pretty good in GW. When you make your character you can choose if you want it to be Role-playing, or PVP only. Don't worry, if you want to role play and PVP you can join in arenas and battles against other role players.
Guild Wars: Factions is an awesome game and to me, better than Prophecies. If you haven't picked any of them up yet, you should start with Factions, if you have Prophecies, WHAT ARE YOU WAITING FOR, UPGRADE! Nightfall comes out shortly and I'm looking forward to rocking that game.
Peace out son.