If you like MMORPGs, this is the best of the breed.
I played it for quite some time early on, when they were still trying to get some of the bugs ironed out -- and it was already far beyond anything else available. (IMO, naturally)
The quests are very good -- for a MMORPG.
The crafting system is incredibly in-depth, and the consignment quests make crafting somewhat profitable over the VERY long-run, not counting the large amounts of money to be made off of your fellow players.
The character system is very nice, the world is impressive (I played in all three realms -- and to level 33 in the Camelot side.)
The game truly shines in the Inter-Realm combat, though. I was involved in some battles so massive that it bogged down my cable connection.
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Keep in mind that D&D (and work) takes up far too much of my time nowadays to keep playing Camelot, so I haven't touched it in a couple of months. Things may have changed somewhat, though I doubt it.