I couldn't get on with Tots Bots at all - they leaked after about 30 mins for us no matter what I tried. In the end I found BumGenius to be the best nappies for us in the early days, then when DD was about 4 months we switched to fitteds and wool as I preferred them (my DH never changes nappies
). We now use Blueberry onesize for nursery and they will normally last about 3 hours - DD sometimes comes home in different trousers if they have left her a bit long, but not often. We never get leaks with fitteds and wool.
I second what the others have said about microfibre - I found using Little Lamb bamboo inserts (you can get them fairly cheaply on ebay) was a good way to increase absorbency in the pocket nappies.