thankfully when i started my round it was all 8 weekly, but also double the price, as its not much use if they still pay you about £10. i still get the "is that time already" mind, its surprising how fast the time goes. i would recommend it especially for illness, the big freeze, as long as you only work 3-4 days a week, you can claw it back if you fall behind.
and cuts down on not todays, but i do have one who wanted it monthly, now is on 3 monthly as she says their still clean?