WTF,pay 8 euro vignette to be bounced around in the cab dodging pot holes the size of the gross domestic product of the UK,go via Mons and Lille or go via Brussels,with a km difference of a few kms to Calais.
Strange how Brussels Euro mp`s sit in flash offices,get driven to fancy restaurants,make silly laws that all the sheep have to abide by,but will not spend a cent on fixing the “craters” on the highway to hell.
Not so bad in daylight,but at night be sure to ratchet down your cab bits and bobs,the wear and tear and damage to suspension is one to watch out for.
Toby you are bang on i was thinking the same on friday
you know we can not call our roads when you look around
europe we are well up there and no one but us pays for them
going to stop now feel myslef going into a rant 
Coming across from Lux, between Mons and Lille I am genuinely surprised peoples wrists are not broken while driving that bit on a hourly basis.