I started taking them I had a lot of infection-like symptoms (dry/wet, itching, swelling). Because I was given no instructions and you only get 24 in the box, I didn't do the full start-up and I sort of got a hint that it might work, but I kept getting thrush symptoms back. So I went back and saw a doctor who said it was only a tiny amount of oestrogen and to go back to the beginning and start again. And yippee

it did.
My prescription said 'Use one or two twice weekly' so I tried every other day and now use it 3x per week (any attempt to use less ends in disaster).
I understand that it may be absorbed more at the beginning when your tissues are thin, but once you have done the 2 weeks, your tissues will be plumped up and you absorb the equivalent of one regular hrt tablet per year.