I'm quite a fan of double length toilet rolls. We have stairs in our house, with toilets on 2 floors, toilet paper stored on one. Anything that means less transportation of toilet rolls is a good thing.
But, twice as much toilet paper on a roll, means twice as much toilet paper strewn all over the bathroom and entangled in the toilet brush when little miss 13 months discovers an open bathroom door.
What is it with babies and toilets? If they aren't decorating them with bog roll, they are throwing things in them. Her own bedtime rabbit, miscellaneous toys and Crash's toothbrush, for example. My toothbrush is apparently not toilet worthy, and just gets carted down the hall.