I'm taking the game relatively slowly as I'm playing it with my family, and as we don't all live in the same place, we don't play it a ton. So far, we've only played 

Ocopus dance (which was decent)
F-zero (which was good)
The Zelda game, which was absolutely fantastic. It's very hard, and requires a lot of co-operation with 4 people, but it's fantastically fun. We finished the regular levels, but haven't gotten all the advanced ones yet.
The Pikmin game, which is a ton of fun, even if it is a tad simplistic. Being able to play as 5 people is a large bonus, too, as we've never been able to play all 5 of us at once with these kinds of games before.

Overall, it's great so far. It's rare that games manage to entertain everybody in my family, but this certainly does. In terms of sheer fun, it's one of my favourite games of 2012. It doesn't have the atmosphere of Dishonoured, it doesn't have the morality issues of ME3 and Dishounoured, and I won't play it anywhere near as much as I'll play Guild Wars 2, but it has something that all of those games lack, and that largely makes up for it.

After not having played any Nintendo games for a while, Nintendoland and NSMB U had something in them that all the other games I've played have lacked. Despite - or possibly partly because of - how simple they are.

I think Nintendo Land is a very good game. Surprisingly so. I payed full price for it, as I got ZombiU in the bundle, and I don't regret it!

The Zelda mini-game is probably my favorite. And it's not just because I'm a big Zelda fan. It's actually very challenging.
The Metroid and Donkey Kong ones are very good close second and thirds, they're pretty good too. Again, very challenging, especially the second board of Donkey Kong.
The only one I don't really care for is the Game & Watch mini-game Octopus Dance. For one, I'm bad at it.
Didn't play a lot of multiplayer, only Luigi's Mansion's mini-game. Was a lot fun also.

I hope they come out with Nintendo Land 2 in a year or two, with the franchises they skipped in this one!

It's nothing fresh and not my cup of tea.

The Octopus Dance is by far the worst game in NintendoLand, also maybe you don't like the game but you can't deny the Ninja game controls work great.

Played it on a demo unit, was confused at what screen to look at.

Actually I can. Calibration is by hand and didn't factor in tv size or distance from the screen. On top of that its accuracy drifted to the side pretty fast. Throwing the stars reminded me of early Wii days when they would use motion controls instead of just buttons.

I played it the first couple of days I had the system, haven't touched it since.

That's very good to here, especially from you. If I remember correctly you had quite Sony-biased posts. (Nothing wrong with that, I'm just saying.)

I played the game multiple times and I didn't have problems with the game, It not the best game but it's quite fun imo.

Since I got the ZombiU pack I had to buy Nintendo Land separately and I didn't regret it. I haven't played all the mini games yet, mostly the single player ones and 3 player Zelda, but it's great fun. My favorite game so far is probably Yoshi's Fruit Cart because it's very relaxing, but also needs some serious strategizing in the later levels. I would love a full blown strategy game based on this.
I also like that most of the games are really reliant on your own skill. First time I played Takamaru's Ninja Castle, I was dead tired after the first level because I was frantically throwing ninja stars at everything. Now I can actually chain combos together and get way more points doing essentially less.

My only complaint is that the unlockables on the plaza could have been more meaningful than a jukebox, a bunch of buttons and a lot of eye candy.