Real Madrid signing of Mbappe from PSG was big surprise. Many top players want to join Real Madrid because of their reputation and influence. Although Madrid has made some expensive mistakes in past they did great job this time. Having strong team is not easy even with a lot of money. Barcelona and Atletico are also trying to improve their teams but Atletico is spending most money this transfer window. Barcelona ca not afford to buy all players their coach wants because of financial problems. Having good team does not guarantee success as we saw with Girona last season. Strong team is important but it is not the only factor.
Having strong squad depth is not the only factor that can enable a team to achieve the best performance. And all of this was proven by Girona last season when they were able to compete for the title in Laliga with a squad depth that was actually quite ordinary. But Girona is able to compete with Barcelona, Atletico Madrid and even Real Madrid, which of course has a better squad. About Mbbappe who managed to get Real Madrid I'm not surprised at all. It's just that what makes me appreciate Real Madrid is because they are able to patiently wait for Mbappe until his contract at PSG expires. And Mbappe also joined Real Madrid on a free transfer and I think that was an extraordinary move and extraordinary luck that Real Madrid had.