I really love this product and didn't know how useful it would be until we had it.
It is very easy to use. All you do is buy the insert and put it in when the bag runs out of the old one. Then you open the lid and place the dirty diaper inside and push down a little. It then goes into the bag and the section closes so the smell does not get out. Once it becomes hard to press the diapers into the bottom, it is time to take out the bag.
I have found that with the product there is no smell in the room! It also helps keep the messes of dirty diapers from going everywhere.
Each refill is about $6 and it lasts about a month or so. I think it is definitely worth the price! It saves a ton of time and I really don't know where else the diapers would be able to go that would contain the smell. It would end up using a ton of regular bags without the product.
I would really recommend this for any mom!
Update On Feb 16, 2008: I wanted to add that this product still works great and even though now we have to buy more inserts it is still worth the price. The inserts are so easy to load and it is even easier to remove. I still love this product!