At the Stade de France, the sound can be bad for those who have seats in the last ranks of the lower and middle sections
Otherwise it's pretty good.
Amsterdam Arena had the worst sound I ever experienced.
Giants stadium is good, and the Stade Velodrome in MArseille is great. There is no roof, and on a shiny day without wind, like in 2003, it's a fabulous place.
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doctorstonesblog.blogspot.com]