These pull-ups are a great product, depending on your purpose. If you have a child who has occasional accidents at night, then by all means, use these (as I do with my twin daughters). However, if you are trying to train a child to use the potty, I find these don't work as well. They are just a different type of diaper, like the new pull on diapers. My son, who doesn't seem to be interested in potty training, even though he just turned 3, wears these like they are diapers. I put him on the potty, but he won't go there. He prefers to pp and poopoo in the pullups.
Overall, I think that this product is confusing for kids who are taught not to go in their pants, but don't have any consequence to going in the pullup. (Meaning a mess on the floor instead of just being wet, like in a diaper.)
If you don't want to deal with the messes on floor, than try pull-ups, but expect the process to take longer. If you want to train quickly and more efficiently, put regular pants on your child, deal with the mess for a few days, and be happy it will be cheaper, faster and less confusing.