I have both the originals and micro.

They work pretty good on Miss M - quite a big sizing too - she is still in the smalls at nearly 4 months, and has a while to go before she is out of them too.

I don't think she is a huge wetter though (well compared to her fire engine hose brother!) cos I tried him in MD's and they didn't work for him. Got leaks. I think its a pressure thing with boys too... it comes out faster than the girls trickle.. lol (gee what a conversation..)

HTH!!