The Devils Bolete is certainly not deadly and some people even eat it after long cooking (French sources).
The one to be careful of is the bitter bolete because it can look so much like a Cèpe but it's soOOOOOOOOOOOO bitter. One small one in a dish will spoil the whole lot.
I know I've been caught out
Tubed mushies are probably the only type where you can't go seriously wrong.
Another tip: Only ever eat mushies (fungus) in perfect condition.
Even good edibles can upset you if they're past it
Chris, Lyon