These are the worst tires I have ever experienced, by far. I would even say that they are dangerous.

They replaced 4 Uniroyal RainExpert tires which were very worn-out. Apart from the fact that they were noisier, the
worn-out Uniroyal tires were much better than the brand new Toyos.

Positive: -they are quiet
-quite comfortable, although not as comfortable as you would expect from such a soft sidewall

Negative: -slow steering response and poor grip on dry, wet and snow
-very long braking distances in all conditions
-very soft sidewall which gives awful handling characteristics
-imprecise steering with very little steering feel
-unstable feel at all speeds, dangerous almost. In corners, the back end is all over the place
-the car is leaning much more into corners, compared with other tires

It may sound harsh, but this is my honest experience.
I am replacing them after 10000 miles, even if they seem to have tread left for another ~15000 miles.

There is nothing wrong with the car, these are the first tires that made the car behave like this.
The results are the same with any tire pressure.

I know that you can buy Toyo Celsius tires made in different countries.
These 4 have written on the sidewalls: Made in Japan.

this is a tire for bad summer, like snow in the top of the mountain, frosted morning. heavy summer rain, mud and outback country road.very ggo for the people who like put his summer tire early and late to put winter tire in automn.

Very pleased with my choice. The tires are true all weather. Warm up very fast and they have plenty of grip dry and wet. Snow grip is just awesome. With a simple 2WD hatch i managed to pass alot of roads with heavy snow for alot of km when other vehicles were facing difficulties even with snow chains.And all that was done smoothly and easy. Even on icy surface didnt let me down.
Price was also the lowest 200euros installed. I would definitely buy them again.

These were hard to find when we got them, but they were specifically chosen as a std, all season tire to replace the back breaking runflats on the mini. What a revelation, they totally changed the handling, comfort and stability of the car all for the better.
They've only experienced light snow but handled this fine, as with ice, mud, wet and dry. They made the car FUN and gave my wife total confidence whatever the conditions.
I tried three different all seasons on three different cars, these Toyo Celcius on the MINI, Pirelli Cinturato (self sealing) on an Altea XL and Goodyear Vector A/S gen 2 on a Toyota hybrid (that are approaching 30,000 in 4 months with 4mm left). All of them were chosen for the specific vehicle use and all have performed well, with the Goodyear seeing the widest range of road conditions and proving almost faultless. I would buy any of these again for the cars they are on as they suit the usage of the individual cars (MINI for a great driving tire (TOYO), Altea for self seal against puncture (PIrelli) and the Hybrid that travels anywhere in any conditions (Goodyear).
I hope this helps someone.