I just wrote a nice reply and the computer ate it
Anyway,

I love the ittis o/night and DS rarely needs a change. I only change if he smells like he needs one (wee or poo) as he still wakes during the night. Some nights I don't change at all, and others only a couple of times at most. With the ittis you can get an extra mini booster to snap in if your child is a heavy wetter, mine's only a medium so I don't bother with it (got one to try but didn't need it).

Occasionally I'll use a green kids (GKs) pocket nappy with a bamboo booster and insert in it (usually only if it's close to when he might go down but might still stay awake/ have a short nap but sometimes he surprises me and goes for a longer nap) I think for me the itti's have more absorbancy - well I trust them more than the GKs even though they probably are as good as each other.