I have found 4 MUCH MUCH harder than i thought it was going to be - 3 was a breeze. However, my age gaps are much closer than yours (4 in 4 years) and I think the strain of having 3 in nappies didn't help with everything else. Plus, we have sleeping issues in this house - none of our children put themselves to sleep, and none sleep through the night - even the 5 year old. Everything is much harder when you have sleep issues I think. I still have days where I think "what the HELL have I done" especially when they are fighting all day and since there are 4 of them, all of them can have a turn at fighting with each other, so it just seems like I break up fights all damn day. Plus 4 kids making mess = a lot of mess. 2 of them in one room trashing it, while you are cleaning up another mess, then you clean up that mess, and the other two are in another room making another mess. Plus more fighting about what to watch on the tv... some days I feel like leaving to be honest and letting them fight it out amongst themselves.. LOL

Plus - my washing tripled I think when I went from 3-4 dunno how that happened, but I have to do a load every day without fail or else I'm way behind.

Other than that... ummm. Yeah its fun? LOL