This looks quite tacky to me, as others have said it looks a lot like some CC out there. It doesn't look like it belongs in Sims to me and well I prefer the KP one to this.
I actually think it looks great! I'm going to be perfectly honest about CC though. CC can actually look and is really nice, (I use it once in a while), when someone takes time, properly meshes it, and tests it to make sure it's virus free. It adds a ton of varying options, and I treat it no differently than the hair and clothes I get at the store, an EP/SP or even the base game. (It's the skins and eyes I don't like but that's a different story). I think the stuff is very nice, and could add that extra appeal. Maybe I could re-color some of it, but I like to leave some patterns/designs alone.
I think it has that balance. I'll be buying this with KPST. I really love this SP. So I will have a set of boring realistic furniture I can re color with fun patterns, a set of classy outfits for my more serious Sims with No Sense of Humor, and to please my childish ways, and the frivolous themes, that's where Katy Perry comes in. So I'm really excited about this stuff pack.