Steer clear of this game.
Neverwinter is basically a siren - it lures you in with superficial pleasures and then gobbles you up. When I first started playing it, it was great, and got steadily worse until I hit max level, at which point it became abominable.
You level up so quickly that it's practically meaningless, and often even harmful - you'll likely start groaning when you level up, because you get locked out of skirmishes (see below) and quests (some of which give important stuff, like a bigger inventory). Initially, you go through interesting, well-crafted questing areas of which each will entertain you for an afternoon. They look nice, but they're designed the same - a sequence of fields chock-full of enemies, connected by corridors, with 2-3 merchant/health regen stations in-between. If you do any PvP or invocation (XP-and-money button that you can use every hour), you'll overlevel and get locked out of stuff.
Each area has one skirmish (a 15-minute dungeon with one boss, most of which you'll skip because you'll overlevel) and a dungeon (40 minutes to 2 hours, linear sequence of rooms, 3 minibosses and 1 big boss). They are always optional. Even without doing much, you'll hit lvl60 in two weeks (I did, and I'm the ultimate pansy casual player).
And the endgame... just isn't there. Once you hit 60, you have no questing areas. You'll stay in the first and only hub area (Protector's Enclave), invoke, craft (which is busywork - you do it to upgrade your craft level, but you'll never get anything that you won't want to discard immediately), and - get this - do all the dungeons from level 1 to 60 again, except now they're "epic" variants (with harder monsters).
That's all there is to the endgame: doing the dungeons you've done already, again. And it's a complete waste of your time unless you do them at a specific time each day (during the "Dungeon Delve" event), when a chest after the last boss drops a rare, purple item. And unless you have four friends that'll come with you, you have to queue with random people for each dungeon. The party-leader has absolute power and can kick people out (they won't be replaced), and if anyone disconnects, you might as well all leave because doing a dungeon in 4 is suicide. If the leader disbands the party or kicks you all out after the boss is dead, he gets to keep all the loot, and you've just wasted hours of your time. Every enemy is a HP-sponge, and can be tackled by simply dealing the maximum amount of damage. Bosses are even worse - they are HP-sponges as well, but they'd be pushovers... except for their one mechanic (and every boss has it, in a completely identical fashion): spawning tons of monsters, each a HP-sponge, continuously, and a horde at certain fractions of its health. Every boss battle is an exercise in herding an army of imps and zombies, which are a bigger threat than the boss.
You can PvP too. There are two maps, each 5 vs. 5, with three points that you have to hold (domination/king-of-the-hill style). If the class balance wasn't screwed up, PvP might actually be fun, but there's really no different roles to the classes - except for the cleric, they all succeed by simply doing the most amount of damage possible; the "tank" is barely 10% more sturdy than the rest, and can actually be statted to do the most damage; clerics are dispensers of a single AoE healing power, Astral Shield, and nothing more; everyone else is a damage-dealer. Half the stuff you spend points in doesn't work (there is no disclaimer which feats are broken) and there is often a single "good" build and countless horrible ways in which you can make your character completely useless. Similarly, there is often one "good" set of equipment, the rest is there to sell. Oftentimes, a single thing makes-or-breaks your build - you can spend five points in a feat and get nothing, or 1 point in another feat to double your power, and if you don't know which abilities are best by concensus, then good luck.
They've just added "Gauntlgrym," the supposed endgame. It only works for guilds, can only be accessed at certain times in a day, and consists of three stages: a dungeon, a 20 vs. 20 PvP, and another dungeon. It also doesn't work, and it's been currently taken offline.
Anyway, fair warning. This game is the first 20% of a good MMO, and nothing else.