Most classes in World of Warcraft start at first level, but Death Knights and Demon Hunters are exceptions. They start at level 55 and 98, respectively. This alone can shave a huge chunk of time from your leveling experience. Of course, it only works if you want to play a Death Knight or Demon Hunter, but they’re both solid classics that can dish out damage or tank in a group.
WoW leveling boost includes not only pumping a character from from the start, it also includes other annoying timegates created by developers. For example, reputations: there are dozens of factions in Warcraft, and with each expansion they keep adding much more. Most of them are there just for the relevant loot, but some contain unique mounts or rewards you can’t get without attaining an exalted status with them. With our help, you won’t have to worry about grinding reputation anymore. Or there are professions - If you’ll buy WoW leveling you can forget about hunting for reagents to achieve the maximum skill for the handiwork: from the simplest gathering skills of Mining or Herbalism to the hardest crafting jobs such as Engineering and Jewelcrafting. And there are many more: just check out the Leveling category on our website – it’s all there!
Usually it's best to avoid a lot of instance runs. It is too difficult to account for bad groups, and some instances are too far away with too few quests. Since the experience is very good, it's a good idea to clear nearby instances which have a lot of quests once (Gnomeregan, Deadmines for Alliance). Distant instances with few quests should be avoided (Deadmines for Horde). Low level instances can be cleared by paying or befriending a single high level character. However, since patch 3.3 a new Dungeon group finding system has been implemented, as well as a direct port to dungeons (when entering the group you get ported to the dungeon and back to the same location if you leave it) and thus the travel time to dungeons has been greatly reduced. This makes it a good idea to complete quests or grind while you wait for a group to become available.