I have used Airalo many times without any problems. Twice this year, for Italy, England and Scotland, but over the past 3 years in many different European countries. Easy to buy, install and use and reasonably priced. I install it before I leave then turn it on when I arrive, it activates itself quickly. I have occasionally been tempted to try someone else a couple of dollars cheaper but why bother if I have no problems? In a $10,000 trip saving $5 on cellular data is not so important.