Similar if you are from Switzerland and cross any border. If you are in Switzerland semi-regularly, either get a plan that has cheap roaming in and out of EU, or two SIMs.
Ironically, calling a friend in Paris from Prague is free, while calling from Zurich is 70 cents a minute.
My sister, who lives in Vienna, is shocked about our subscription prices (ca 70 EUR a month, unlimited everything and EU roaming as described above) while I'm more surprised by costs she incurs while visiting.
To me the deal is fine. It may not be the cheapest but I never incur any additional costs.
Even globally you get 100MB free internet with your subscription per month and can buy additional packages for about 20EUR per GB, which I don't think is unreasonable.
Other carriers are more on a rip off spree. While SALT intices customers with cheap subscription offers they may hit you very badly with internet roaming costs. Until very recently they didn't even allow to set a limit.