Alrighty, thought I'd drop in and talk about it since I just got my hands on it.
In a nutshell, its awkward but promising. I think it could be an analogy for early W10M itself.
It's clunky, lacks features, may not be best for a daily use app, but it has a bright future ahead of it if all (or most) goes well.
I can send photos to people it seems, but I haven't tried it myself - don't think I can edit photos I take though. I can receive text, video and picture messages.
Stories are called "Day" messages and viewing them works (it actually uses the built-in photo and video viewers) but its slower and less fluid than Snapchat in reality. Whereas Snapchat loads all at once, Specter takes it on-demand.
The backend appears to be handled by Casper, a third-party Snapchat app available on Android. (and the site says it supports Blackberry interestingly enough)
If you pop onto it's Facebook page, it appears they deal with ban waves well enough with API changes and whatnot. And bans appear to be 12-24 hours, although I remember 6snap where there would be a few tempbans before the hammer came down. A really interesting thing since you'd expect all Android users to make do with the official app. (although most do)
I might log back into SC on this iPhone 4 I have though because the features probably outweigh not being on my body all the time.
I would definitely consider looking at it, since you're probably looking at a tempban or a few before a permaban and behavior appears to affect what Snapchat detects.