I have waxed and waned on this since having DD1 7 and a bit years ago. After DD1 and then again after DD2 I returned 3 days a week 8 til 5. It certainly was easier to manage when they were at childcare as they could stay there til 6 and while the dinner bath bedlam wasn't fun, it was so much easier than negotiating the whole school thing.
I now work 2 days a week in house and start around 930 and end in time to pick the kids up from school and preschool. DS1 has a nanny those days. Although my contact hours are shorter I have to do work at night or on the weekend when I can fit it in.
It's a long winded way of saying I'm not sure whether I'm better for working. I feel so tired some weeks from juggling 3 kids, work, after school activities, meals etc that I feel like throwing it in. But then when I'm at work I enjoy the actual work and feeling like something more than just "mum". Don't get me wrong I love being mum but I need more. That's just me and not a reflection on anyone else.
I think it also depends on the nature of your kids. DD1 is a very social easy going kid who fits in anywhere, and DS is shaping into the same. DD2 is clingy, extremely shy, tends to be very whiny, tires easily, and doesn't adapt to change very well. So for me if I only had kids with easy going natures work would be a breeze, but because I don't it's harder.