Avoid 2007/08/09’s – all had poor failure rates.
2010 onwards much better but I’d be very wary about buying a Commencal with no warranty.
Agreed, …with 2009 being peak year for failures IIRC.
Also some reports that the Small & Medium frames don’t appear to suffer failure as much as the Large and XL. Possibly due to different configuration of shock upper mount on those sizes.
Personally, broke a 2009 L at the seat tube/TT.
Replaced with a 2010 XL which is certainly tidier around the welds and has a thicker guaged seat tube (now tapers to seat clamp).
As well as the redesigned frame coming in 2010, I believe they were also manufactured in a different factory too.
Appears that 2010 was a serious attempt to recover reputation and consequently MUCH better quality.