Very hard back high on the heel, hits the leg, unjustifiable for Adidas. I wore them twice and gave them to a friend, suggesting that he wears them with thick socks.

Very hard on the sole. I expected them to be softer because of the Boost sole. They are definitely not worth 80 euros. I believe my purchase was bad.
Non-slip outer sole (Yes).
Boost shock absorption technology for unmatched energy return (No).
Running shoes with shock absorption.
Boost midsole for energy return (No).

Although I didn't like the shoes visually, when I wore and used them, they were very good. I couldn't believe it

I bought these based on my previous adidas shoes (which I still wear), the Senseboost GO. Unfortunately, the technology in these shoes is nothing like the GO. I didn't know that the ones I have are like feathers in terms of cushioning compared to the X9000l3, which are very hard. Unfortunately, this is the downside of online shopping, but I didn't return them because I bought them at a good price and kept them aside for about 2 months until I could wear them properly. So now I just have them sitting there, waiting for the stores to open so I can go and try on and buy a new pair.

Lightweight...comfortable enough on the sole due to the boost, although the density is high, so it's a bit harder...not at the ultra level obviously, and the heel is slightly uncomfortable...but I consider it a good value for 65 euros