The Telegraph says it is "comfortable to hold," has "a real sense of fun" but has a "cumbersome" CPU and "lacks a real system seller" game.
The Guardian says its multiplayer games are "enormous fun" but the split controllers and screens are a "difficult proposition."
Gamespot likes its "exciting innovations" but isn't as keen on its "cheap hardware" and "clunky OS".
Techradar thinks it's "wonderful" to finally see Mario in HD and a "fantastic perk" to be able to play your console without a TV, but criticised the GamePad's battery life and range of available games.
Tweets from gamers this morning suggest customers won't have to queue for long to get their hands on a Wii U:
The Wii U is the first major UK home games console launch for six years.
This is a timeline of the market leaders' releases:
- 1994: PlayStation
- 2000: PlayStation 2
- 2006: PlayStation 3
- 2002: Xbox
- 2005: Xbox 360
- 1997: Nintendo 64
- 2002: GameCube
- 2006: Wii
- 2012: Wii U
The first major UK home console launch in six years took place at midnight, with Nintendo's Wii U hitting the high streets.
Close to 300 fans queued outside HMV's Oxford Street store last night in London to land the new device.
The Wii U, which features a new tablet-type GamePad controller that allows users to keep playing away from a connected television, was released in the US earlier this month.