I have just upgraded to X2 and am finding it excellent. Just a word of warning though, I was tempted to upgrade because the offer said:
"Corel® Painter™ Photo Essentials 4 is included in all language versions of the new Corel Paint Shop Pro Photo X2 Ultimate edition"
However, this is a watered down version which allows you to do arty things to your photos (good fun), but does NOT have the facility to start with a fresh page and draw (or layers). I had a polite grumble with Corel, as I think it is missleading, but they have not replied.