True Elektron quality
Sound: Crisp and un-compromising. The timestretch algorithms produce loops that sound great within 10bpm, and the transient shaping is adjustable. Few harmonic artifacts, and more granular artifacts. IO section seem very clear to my ears.
Support: Not as great as it could be. I've been reading some scary stories of Elektron customer support, and thankfully I haven't had to contact them yet. The lack of ability to use the Octatrack attached to my PC as a controller/outboard device/interface is silly (CF card could maybe be used as a memory buffer, from what I gather?). But that's not an advertised feature, just a pipe dream for us OT users.
User friendliness: Much like a video game console, the trigs are made of durable plastic and are lightning fast. Accurate too, you will hit your intended key press 99.9% of the time. Pots (knobs) are accurate and silky smooth. Crossfader is accurate and rhythmic for quick musical transitions.
Learning curve: Difficult. You will likely spend many hours figuring out the structure, hotkeys, and troubleshooting. Whenever you realize what you did wrong, it opens up new pathways to understanding this machine's power! Practice practice practice!
Aesthetics: Retro look, with modern 24 bit sound. I don't care for a screen upgrade, given the accuracy and brightness of what it has currently.
Other: I got this device to replace using a laptop for spinning and remixing in live situations. I am so glad I did! It's really its own instrument, and it does what Elektron says, it takes sampling to a new art form. I always use unique gear in my studio and live situations, so I had to go for it.