I bought the Rockrider all mountain trousers last winter after positive forum comments.
The arse wore through in 3 months of winter riding – all with mudguards. 2 rides a week max. Disappointing.
Also, the fly flap is a right pain. The fly is too short and covered by the flap to use on its own, so its faffing with poppers (impossible with winter gloves) if like me frequent mid ride (or post pub) stops are required.
I fixed the worn bum panel with gaffa tape, went to pull it off to replace the other day, and the supposedly heavier duty fabric on the bum just ripped away. So now they are in the bin.
Otherwise they are OK for keeping spray off but offer no warmth.
You get what you pay for I guess.