I hated the leaking with belly band, so I put women's sanitary napkin on top of belly band and it works great!!! It keep boys dry as well!
I buy store brand like cvs, duane read, or target.... etc, so it doesn't cost much. sometimes, I use wee wee pad (fold in 3) and sanitary napkin on top of it, and it is money back guarantee no leaking at all!!!!!