User blog comment:TenshiAkari12/IA TypeC - 1st Day's Verdict.../@comment-17388794-20140128073853/@comment-32500188-20140129183806

... I've never experienced that crashing problem. I've had no problems with having a main and several harmonies set to the demo bank at all, so I'm not sure if it's a system resources issue or what that could be happening on your end?

As for her higher range... I have to agree with Angel, Haku has no voice, there is only "failed Miku". However, I do get what you mean, although I think she sounds more or less like the original VB instead on some of her notes, though I think some of that was done purposely for added "realism". It also depends on how they're transistioning as well, because I have heard some notes that fly out brightly at times above that range.