Krita is quite honestly a very impressive piece of software. It's shaping up to be quite a formidable FLOSS Photoshop competitor. For all of GIMP's effort, its interface comes across as a little too far removed from Photoshop, and as a result, it failed to win over many artists at all, whereas Krita, even if it does not aim to be a 1:1 PS clone, it remains in an area that's comfortably close to PS in the overall "feel." There are definitely areas, e.g. the brush system, that I'd argue are an improvement over PS anyway.