UI seems much different than previous Rigol scopes. Which is good thing.
Like everybody already said, in this price/target market range, they will have to do better with software polishing and debugging.
Not that A-brands do everything perfect, but they perfected "we care about our customers" dance, even if it is not always true. But they do customers relations real well, they make you feel they care..
Also, all A brands are very good at very thorough instrument characterisation. Not that they will publish it all, but when asked directly, they know exactly how they instrument behaves and what it can't do.
It's just they don't put all it in datasheet. Or sometimes even say it on the record. But they will tell you something like, "...well, now that you asked, I believe it it might not be optimal for that purpose.. For that purpose I would recommend this and that as a better solution..."
I'm not sure how deep that mentality goes in Rigol.