Depends how much you sweat normally as to how comfy they are. I’ve got one and find it great, but then I don’t head sweat much. Certainly hot in the summer, but for the other 364 days of the year I find it fine.
Just used mine on a 160km xc ride over the weekend and heat wasn’t an issue. Note also Decathlon do a similar style lid for £29 – got one and it’s OK.
Bought the Urge as I find normal helmets a bit loud, and I used to get that ringing in the ears using a Fox XC vented lid. The Urge for me is quieter. However for night riding I use the Fox as I don’t want to glue a light to the Urge.