I have 3. A baby bjorn, a meitei and a shell sling.
I made the meitei and the shell myself. I would have loved a fancy store bought one, but I just couldn't afford them.
I love the two I made myself so much. Both have their uses. Meitei takes longer to put on but is great for long periods whereas the shell is great for quick trips. I have used both since Nate was born and I can carry my 3yo in both too.