Downloaded a trial of painter today, after reading about it from a guy on DeviantART, named Elsevilla. (superb artist btw)
And for the longest time, I've been using an old version of Photoshop.
What a difference.
Now Photoshop is not bad, but it is a jack-of-all trades, giving you limits to just what you can do with your brush. It is quite easy to learn and use thou.
Painter on the other hand has an enormous amount more options for you to mess around with.
If your a serious digital painter/artist, you have to use Painter. Because it's a specialist product, built for digital artists.
The only real drawback I can see, is that it's a bit difficult to get your head 'round. It feels a lot different to what I'm used too, and there are so many more options that I get confused.
So I think I'm going to have to go over tutorials as to how everything works, and to create the brushes that I want.
But once I get the hang of it, it should significantly improve my art.