I installed Manjaro sometime during 2018, and I have been using it without any major issues. The only issue I had is when AUR packages fail to update. I find that most of the time the issue will resolve itself eventually anyway. Overall, I feel that Manjaro is a nice and stable distro.
The only negative I can think of is the community. At the time, I was bluntly told to read the manual whenever I needed help or pointers. But, my negative experience was from a few years ago, so hopefully the community has improved today.
My daily driver distro today is Mint, which I think is more polished than Manjaro.
I tried it. It works well. But, I don't think I will use it, because I usually know YouTubers to avoid when it comes to clickbaiting. Looking at you, Scotty Kilmer. :)