I bought a pair of the 'classic wool knickers' from fixation (don't ask why!) and was HUGELY disappointed with the quality control. Nothing major, just silly little things that should have been spotted - a missing button, neither pocket was fully stitched and a seam was coming apart.
I let them know and in fairness they did offer to reimburse me for the cost of repairs, as it was not worth me sending them back for what was effectively a tenner to put right, but I didn't take them up on it.