It's not. It's almost identical to the bq Aquaris E4.5 except for the screen, that has no virtual/capacitive buttons. I spoke with bq yesterday about the phone,

http://www.xataka.com/moviles/ubuntu-en-smartphones-a-por-to...

And was able to use it for a few hours. Not what anyone that thought about buying an Ubuntu Edge would have expected, but anyway, a cheap way to see if that experience is really worthy to you.

I won't say if it's worthy for me yet. I've got to write about it next week :)