my immediate impression of using it is: it's very hard to see, for me, the contrast is all wrong and no combination of skins and brightness/saturation can really fix it. The fonts are really thin and small for an old lo-res monitor too, which makes it nasty on my desktop. I'm sure my laptop will love it though.
I've not really been sucked in by it, not immediately anyway.
This is partly because I have projects to finish that I am no way saving as L10 format, so I'm working in L9 for safety.
Now, I can see that all the little workflow things would be useful once I get them into my thick skull. So, for example: dragging a clip out of it's track makes a new track with all the right instruments, yep, I needed that today (and everyday). But it didn't make me say "right I've got to close L9 and open L10 to get that function". I just did it the slow way in L9. The pain of that issue is small.
The things in L9 which really wear on me - the damn browser, the inability to find my stuff, the lack of previews on my presets, etc. none of that is fixed in L10 - so again, no pressing need to switch over.
The other thing which kills my workflow every day is arranging chunks, verse and mix alternate versions, trying sections out before committing them. None of that is different either. So despite the nice slip-editing, I just do that the old way in L9 (click the clip, press ctrl on the start marker does slip editing in L9) .
Not to say it's a bad update - it's got a lot of stuff, but nothing that makes me need to switch over. I did really like the echo effect, and the wave synth has a nice interface and makes good noises. Those are nice and will be useful. But not essential workflow tools like ... well, every day I say "jesus fucking christ how can I arrange these damn sections, where did that damn middle bit go, did I just bloody delete it oh shit", etc.etc.
So the nice new things are nice and good, but nothing so essential that it is pulling me in, and that added to the sqinty-interface is keeping me working in L9
So, I'm sorry to say that L10 is gonna be a slow burn for me.