My understanding is that if the creature is conscious at all, and it acts observably like a human with the kind of experience we care about, THEN it likely has the kind of experiences we care about.
Do you think it is likely that the creatures will NOT have the experiences we care about?
(just trying to make sure we're on the same page)
It depends how the creatures got there: algorithms or functions? That is, did the designers copy human algorithms for converting sensory inputs into thoughts? If so, then the right kind of experiences would seem to be guaranteed. Or did they find new ways to compute similar coarse-grained input/output functions? Then, assuming the creatures have some reflexive awareness of internal processes, they're conscious of something, but we have no idea what that may be like.
I found this article on the Brain Preservation Foundation's blog that covers a lot of common theories of consciousness and shows how they kinna miss the point when it comes to determining if certain folks should or should not upload our brains if given the opportunity.
http://www.brainpreservation.org/not-all-theories-of-consciousness-are-created-equal-a-reply-to-robert-lawrence-kuhns-recent-article-in-skeptic-magazine/