[Fletch137]

It's not something I've used to any great extent, just that I use the steam runtime developed for it on my arch system and the lead developer has been a guest on a few podcasts I've listened to. That said, this is my impression of it so far:

Solus is a distribution built from scratch. I believe the main target is non-technical end users, rather than, say, servers or power users. What that quite equates to, I don't really know beyond missing certain development or server software from the base install and in some cases the repositories. I currently can't see a way to install external packages (like the AUR or PPAs). I've had a play with it for a couple of hours and it's pretty slick, with really fast start up times. It's probably not ready for you to hand to your Grandmother just yet, but it seems very user-friendly to me. I have it currently running on a laptop I gave to a friend around 4 months ago, and so far it's the only distribution I've been able to hand over to a non-technical user and not get called to fix/change/etc. every couple of weeks.