haven't tried Tots Bots yet, but have one BG v4 and one Wonderoo v2 en route to try (nursery nappies for September!)
My sister has tried the Wonderoo V2s and says they are the best nappies she's had (mind you, she didn't like the Dunk n Fluff and Weenotions I lent her, so what does she know
Update from me - have used both the minky wonderoo and BG4 now. Love the BG4 poppered one. (although think they are overpriced still.) Not keen on Wonderoo, is all saggy between the legs and leaks out the legs... Is v pretty (got the orange spotty one) but think will have to sell it...