Nah, I don't care if other people want to use them but for me they are the devil's toilet. A bloody nuisance, unhygienic, get tipped over / stepped in at every opportunity, washing them out is gross...I will stop there. Leaving them in nappies until child is old enough to use the toilet seems to make more sense to me. I would far rather change a nappy than a set of wee-soaked clothes, which happens all the bloody time when they are training / "trained".
(sorry, worked too long as a nanny changing other people's wee-soaked children so parents could say "she's trained, you know" )