Mixed. Good in Amsterdam with country-specific eSim.
In Germany, bought regional. In Berlin, Dresden & Cologne struggling to get data and receive messages, regardless of number of bars showing.
Comparing to my wife on Vodafone $5/day roaming, she had no problems with data access.
Moved her also to Airalo in Dresden & was disaster. Both had trouble getting map data, messages via WhatsApp and FB Messenger massively delayed.