I’ve used Ticketmaster for concert tickets multiple times, and it’s always a smooth process from browsing to checkout. The app makes it easy to keep track of my tickets, too. Before my last purchase, I checked the Ticketmaster review
https://ticketmaster.pissedconsumer.com/review.html to see what other users had to say, which reassured me about my choice. Overall, Ticketmaster remains my go-to for events.