I have used it in the past for a few years. I don’t think you should. Why?
- The Manjaro devs are idiots. They have broken the AUR on multiple occasions.
- Their packages break more often than upstream Arch since you get update bundles which they release. This isn’t tested as well as it should and may lead to things breaking.
- Arch is also easier to install nowadays, if you really want a rolling release distro.
If you just want something not-Ubuntu and easy to use, I tend to favor Fedora personally.
At that point just use ‘man grep’.