We were also advised that its better for them to adjust to the routine of childcare by having them in back to back days ...but in our case we did/will continue to do Thursday and Friday because it was/is the days I need to because of work. It was exhausting for DS1 (still waiting for a position for DS2) at the beginning (he's been going since 10.5months - but its what had to be done in our case, but since DS1 is getting older (he is almost 3) I don't think it makes too much difference (he needs to burn off all that energy anyway )...he is just as energetic on the Saturday and we even get up early to go swimming at 8am!

I'm sure you'll work out what suits you and your family. Its good you are able to switch the days so you can see how she goes. Good luck with it all.