Design flooring / vinyl flooring: floating installation or gluing?

So we were advised to glue it by two specialist shops.

Well, they just know what they're talking about...

I understand a bit about it too. Vinyl plank as well as sheet goods glued on VBH is state of the art and unproblematic. It can get wavy if the adhesive doesn’t hold due to too high residual moisture in the screed or due to too high supply temperature in the underfloor heating. But with the supply temperature, you would really have to overdo it, like running at 50 degrees plus. Karsten

I would prefer glued flooring. In my opinion, just by walking on it, you get a completely different and more high-quality feeling.

Our vinyl would also be fully glued down on the upper floor (underfloor heating). This was also the clear recommendation from the specialist!