Ideas on which one to use? qr Scan Code

Hello, We are getting married November 8th. I wanted something different to do for a guestbook instead of signing a book. I saw the idea for a QR Scan Code you can get so your guests can download photos and videos they take throughout your wedding day/reception. I loved the idea but there are so many when I looked it up that I want to make sure I choose one that is legit and good. Any help or suggestions on ones you recommend or have used?