I tried during the week-end, and it's a confortable and light experience.
But Steam (I game a lot on my computer) doesn't work well, it stops showing the store page (it gets all black) when I change the virtual desktop.
I then have to display my library then click again on the store to see the content again.
Very annoying.
If it was not for that bug, I might have switched permanently.
I kept it installed and will retry from time to time if the Steam issue goes away.
A lot of input in the comments, I'll just add mine in the mix.
I guess wanting to change the OS for someone can be good if:
Now, I would go for Mint anyday instead of Ubuntu, because the default matte desktop feels more confortable when coming from windows.
As for Scrivener, I don't even know what it is, but Wine is quite good recently, so if you're tech/linux savy, you could try to make it work.