Is Gemini a legit site?

Excuse me, I'm curious about a particular cryptocurrency exchange called Gemini. I've heard some people praise it, but I also want to be cautious before investing my hard-earned money. Could you please tell me, is Gemini a legitimate and trustworthy site for buying, selling, and storing cryptocurrencies? I'm particularly interested in their security measures, customer support, and regulatory compliance. Your insight would be greatly appreciated.