What’s a nice large European airport? I feel like I’ve heard terrible things of all of them, like LHR and CDG.
Changing between terminals at Heathrow is much less fun.
CDG I find confusing.
I decided to stay at a Heathrow airport hotel a while back. Turned out I had to change terminals and I'm pretty sure it took me at least as long as getting a shuttle bus to one of the hotels would have taken.
You often have to walk quite a ways too.
Overall though Heathrow is pretty good among the large European airports.