Yokomaha s306

Does anyone know where these fall in the range from cheap to expensive? grippy to long lasting, etc?

I currently have these on my Octy (they were on it when I bought it), but the fronts I guess will need replacing in a few months. The bonus of these is that they seem to look like it should be quite hard to actually scuff the alloy (although must of them have already been scuffed)

Cheers,

Matt