I like them a lot. aunty V made me one a year ago, similar to one of your examples. I'd send a pix but I'm traveling. Cosy and Dry has some that look wonderful.
A little bit old -fashioned but very toddlerish ... is that a word. Put into one of those rompers with thick nappies and plastic pants underneath and you'd certainly know your place ... probably strapped into a high-chair!