They're not bad, I only really use them when I'm having an impromptu jam, I tend to sketch out my ideas on the octatrack and then when they are something resembling a song I fire them into logic and then play any melodies etc in live to give more feel. Then I add the effects at the end. I always turn off any effects on the Octatrack, and any external keyboards before recording.
It is pretty good value for what you get, it was only released at Namm this year and has just been delivered out the past couple of months.
I think because all of the chat about the Deepmind 12 this has been overlooked a little and in my opinion is a much better synth.