• The Verge
  

  Labo is an experience where creating and building are just as much fun as playing. It eases you into this world: at the beginning, you’re simply folding cardboard. But just a few hours later, you’re trying to figure out how to turn a box into an interactive drum kit.

• CNET
  

  The Good: Incredible cardboard designs. Really well-done step-by-step instructions. Labo's software and games are fun to play and explore. There's a lot to do, and a sense that many secrets await unlocking.
  The Bad: Yes, it’s mostly just cardboard. The kits can be daunting for younger kids. There's a risk of things breaking, so handle with care. And, where do you store all those large cardboard things later on?
  The Bottom: Line Nintendo Labo is a fun and unique Switch add-on -- a Lego-meets-Ikea cardboard construction set that will unlock kids’ real-world creativity.

• Time
  

  Nintendo's Labo Kits for the Switch Will Make You Feel Like a Kid Again
  
  Nintendo has a history of being adventurous when it comes to experimenting with new types of gameplay... But Labo doesn’t feel like any of these outlandish ideas. Perhaps it’s because in an era in which technologies like motion controls and virtual reality have already become the norm (or are getting closer to it, at least), we’re more open to gaming in unorthodox ways. Or maybe it’s the opposite, and Labo is a refreshing return to imagination in a world in which children are increasingly glued to their iPads. Labo could be a hit, or a flash in the pan. But it’s clear that Nintendo isn’t content with the Switch being just an ordinary video game console, and it’s going to continue trying to give you new reasons to buy one.

• USA Today
  

  My 11-year old reviews Nintendo Labo: 'I think it's going to be the hot new craze'
  
  […]Meanwhile, as a parent, I think Nintendo has struck the right tone for kids. The onscreen instructions supply encouragement--(e.g.: “Push it through the opening as far as it will go. (It might be difficult, but you can do it.”)) Sam and I appreciated that you can easily manipulate the touchscreen to view animated instructions from different angles, and easily rewind or skip ahead as necessary.

• Financial Post
  

  There is one more part to Labo, though, that could endure beyond the building and playing phases, and that’s an entirely separate module dubbed Toy-Con Garage, found in the Discovery menu.
  
  […] Still, I suspect this part of the experience will prove a bit much for most people. Neither my daughter nor I were able to think of much to do with it beyond being impressed by the tutorial. But I’d not be surprised if, 10 or 15 years from now, I found myself reading an interview with a prominent game designer who said her career was sparked at a young age by time spent fooling around with Nintendo Labo’s design tools.

• Pocket Lint
  

  From what we've seen so far, if you like the idea of not only making the game as well as the accessories that go with it, then this is certainly for you. If you prefer something more structured though, at this stage we're a little worried that you might tire of this before you've even built the controller to get you started.
  What's clear is that we need more time with Labo to find out more.
  For:
  -Imaginative and creative
  -Plenty of games to build and play
  -Discovery Garage encourages you to build your own experience
  Against:
  -Not much structure suggests you may tire quickly
  -If you damage the cardboard you'll have to get creative fixing it

• Yahoo Finance
  

  Nintendo’s Labo marries the simplicity cardboard with high-tech sensors to create something truly wonderful. Constructing each Toy-Con project is as relaxing as building a Lego set, while the Labo software makes each kit unique and entertaining onto itself. The addition of the ability to craft your own Toy-Con Garage programs only adds to Labo’s staying power.
  If you know a Switch fan looking for more to do with the console, then Nintendo Labo is a wonderful choice, especially if they’re already interested in building

• Tech Advisor

  We'll reserve a final verdict on the two Labo kits until we've had the chance to test them fully, but for the moment our doubts have been eased. There looks to be a huge amount of depth here - far more than the first trailers suggested - and anyone willing to experiment should find that Labo quickly rewards it.

Reviews are very positive until now.

Any scores so far?

Only CNET gave 8.3 until now, but I think most reviewers that are doing Labo reviews usually don't give scores, its not typical gaming product and its aimed to kids.

TIME gave it 5 stars i think.

So no game reviews?

I think the sales gonna be low at first but it will slowly increase and sell for a long time by word of mouth.

Agree, It seems it want have strong launch but most likely will sell good buy time and especially during holiday season.

Holiday season is the test. Glad to hear that it has depth and is fun. Making your own "games" with it might be really fun.

This is by far the most encouraging thing I've read so far:

Tech Advisor - There looks to be a huge amount of depth here - far more than the first trailers suggested

Because, quite honestly, the first trailer I watched looked as boring as watching paint dry.  The Robot kit, the only one I've seen so far, seemed like something kids would get tired of after a day.  It came across as goofy and lame.  If they've added far more depth under the hood then that's good news.  Otherwise, I don't think parents would spring for more kits.  

I think it's a great concept. Can't wait to see crazy creations pop up on you tube.