Unpacked my new copy of Zombicide and played a solo game last night. Played through scenario 1 with four survivors. The game really plays well solo. Much better than I would have thought but given that it is a cooperative game and the zombies are rule driven in their actions it seems to make sense.
The game really feels claustrophobic and it seems even more so when played solo. Something about the lack of other players makes the throng of Zombies seem even more threatening and oppressive.
The game plays quite quickly solo. Probably something to do with not having to debate your plan of action with other players. :-)