Anyone tried the new flip training pants?

I am curious if anyone has tried the new Flip training pants? They fit to 4 years/50lbs, so was wondering if they would do for my 4yo at night as he still sometimes wees. Not loads, though, and he won't wear a nappy anymore, and I hate buying pyjama pants!

Not tried the flip training pants but my son will wear a bumgenius over night (but only a pink one!) he's dry at night all but about 2 nights per month and once the weather gets better I am going to put him back in pants for bed (we had 2 months dry last summer at night then he wet the bed 2-3 nights per week hence why we went back to nappies at night as I couldn't keep up with the washing as he tends to wet his quilt as well as everything else). He likes the bumgenius as he can take it off himself in the morning to wee on the potty. My son never wakes to wee during the night so he is either dry in the morning or wets during the night. If he does wee in the night it is only a small wee so the bumgenius will hold it.