I found some links earlier, but have lost them right now, but surveys show that most people see the 35 hour week as a positive thing (broadly, 50% favorable, 33% indifferent, 15% hostile, with somewhat more hostility amongst blue collar workers - who lost some pay on extra hours - and women - who sometimes lost out on more "flexible" work times).

Do remember that it was not really aplied in the private sector nor in small companies. Big companies took advantage of the 35-hour week (which were really counted on a yearly basis, actually giving them more flexibility) to reorganise work practices and actually boosted productivity. For instance Peugeot ended up with a 115% capacity use for its factories after putting it in place, thanks to its ability to put in more shifts (people working, on a volunteer basis, 30 hours mostly over the week-end, for instance)

In the long run, we're all dead. John Maynard Keynes