Not the Sommet, but I have the escarpe pro.
If the suspension works the same it is great, never need to use the shock lockout as it doesnt really bob (although longer travel may be different) it is sensitive enough to small bumps but ramps up nicely on bigger hits.
The alu frames arent the lightest but that isnt the end of the world IMO.
I dont think they are as long as some other low long and slack bikes.
They do get good reviews but never seem to find many who have them.