I ordered the KO-II for a friend, after reading about it on Hacker News. I love Teenage Engineering's playfulness and creativity, but was disappointed when the KO-II had quality issues with its input nob, making it unusable.

They were quick to issue a refund, but I would have loved to see them fix the underlying issue and offer us another unit. I'd have the same concerns about this model, since it looks like it uses the same base hardware.