Can only speak for mobileview so far, but I find it... strange. As a German I'd even say "gewöhnungsbedürftig" a ka I need to get used to this.

I prefer all categories being listed in an instantly visible area, thus the design triggers my skepticism when I have to click more buttons than necessary. Not as annoying for me as Wix' Eclipse for DeviantArt, of course, yet I'm definitely glad I I rarely use the store.