The replacement toilets have never clogged, even with the entirety of a toilet paper roll being emptied into them (slight exaggeration).

The lack of water in the bowl concerned me, but the "flushing power" makes up for it. I've had them installed for about two years now and the kids' toilets hasn't had anything that couldn't be flushed.

But, as you mention, these aren't contractor-grade toilets. Indeed, those do suck. I've used plenty.