I'm super excited about this one and also preordered it immediately (grey/black version yea!)
Its always a gamble to preorder, but I liked the UI enough and the creator to roll the dice on it.
I think its going to be great!
On the flip side though and to be critical (I really waited a long time before posting this and am still not sure if I want to):
Something irked me a little in the demo video when he got to the recording part. The workflow for sampling doesn't seem to serve a musical/creative workflow, but instead serves the file system, or system architecture. Set up a recorder, set the quality, make a buffer, maybe name it, don't forget to save your buffer... name that too, etc. etc.
I don't think its fair to do comparisons on completely different machines, (but here we go) ..on the op1 you can set a record length in bars, and record directly to 4 different tracks, pretty much instantaneously, and you can see those 4 tracks with an easy visual indication of where you are, where the playhead is, what the record length is, which tracks have audio and which don't -- with no buffers/names/settings/saving none of that stuff -- its there when you power on next time, no gotcha oops I lost it all because I forgot xyz.
I do think that in a full featured sampler, you need to have those extra things (names/saving/setup/buffers/quality etc.) but then the idea of a fast creative 'in the moment' workflow seems to get completely left behind. What I hope is that over time I will either get so used to sampling on it that it won't be too big of a deal, or that a quick record option with some preset settings, even a different UI would evolve.
This might just be triggered by some bad past sampling experiences, so I will def go into the 301 with as open a mind as I can.