I wandered around their site and their FAQ actually addresses the cloth diaper with their pants thing... apparently it tends to be leaky, so not really ideal. The cost of the inserts seems to be greater than the cost of simply purchasing a disposable diaper, even if one buys the slightly better for the environment and thus slightly more expensive disposables. And that's not considering the cost of the covers or laundering those bits. I'm not sure I really like having to rip up the liners to flush them, that seems like a yucky accident waiting to happen.

Good suggestion, and they certainly look cute, but I'm not sure they are a great solution.