A disappointing experience, as someone who's played Katamari Damacy and We Love Katamari. I mean, yeah, I suppose it's still a Katamari game, but it just feels like... something is missing.
I do like the jump and squash and stretch mechanics, but I feel like they make the game a little too easy to control (with Katamari, I think learning to control the katamari efficiently, despite how hard it is initially, is part of the fun).
The levels are fine enough, understandably they couldn't be really big, since this is a handheld.
What really irks me and keeps me from fully enjoying this game is how strict the time limits are. In the original and We Love Katamari, you had plenty of time to familiarize yourself with the stages and still be able to get a good score. Here, even if you try your hardest to optimize your route and stuff, you won't get more than 70/100 points. Oh, also, this game has an actual scoring/rating system, instead of the King just saying what he thinks about how you did. I don't like that.
The levels are also very repetetive. Very little variety in level goals.
As for the presentation, yeah it's totally weird and uncanny, but honestly I'm all for it. Katamari games always have that kind of wacky vibe, and here it's turned up even more. But the other games in the series that I've played do it better in my opinion.

If you just want some Katamari action on your Vita, this is fine, I suppose, but I think you're better off just playing earlier entries in the series. (Keep in mind, I've only played Damacy and We Love Katamari apart from this one)

(my steam review from a year ago)
Overall, I do reccomend this game, BUT only if you really like picross and/or have a huge soft spot for cute robots. (I happen to fit both)
The story is... okay... I have a couple of gripes with it: there's a big issue with tone, someone dies and the characters immediately crack jokes or something; most of the characters are really... flat, some of them are straight up stereotypes; there's also some more questionable choices with writing... but overall I did like it. It's not phenomenal, but it's enjoyable. S.C.O.U.T. is well worth going through the weaker parts of the story <3
Oh also, the story starts out really... slow, it gets better though throughout the cases. The last moments of case 4 felt unsatisfactory, for me at least, though.
As for the gameplay... prepare to do a LOOOT of picross. Every 5 minutes or less you get a new puzzle to solve to progress the story, which is fine by me, because I really like picross, but yeah, there's a lot of it.
Not one of my favourite games, but I liked it. I'd say the strongest part of this game is its visuals. I love the UI and the character designs and the general art style. very cool and pretty.

Great game, though I liked Origins better. The main hub and levels don't quite have the same whimsical feel Origins' levels had, the story is also weaker, it's barely there - though likely you're not playing this game for the story.
Rayman and friends feel great to control, the special challenges and stuff add a lot to the game. You can even play levels originally from Origins, though it's not the same to me...
I think the biggest issues I have with this game is with tone and style, it's just less appealing to me than those of Rayman Origins. Also not a huge fan of the soundtrack, where the previous game had an amazing one in my opinion.

I'd personally reccomend Origins over this one, despite Legends technically having more content. But both Ubiart Rayman games are great.