I have used snap lock lids in the past and absolutely love them. I have even converted my dad to them. These containers are great containers actually. The plastic is good and thick the way it should be for food storage. The lids snap tight real well and with ease. They also come open with ease. There is one problem though: the lids leak. Each and every one of them. I am disappointed in that fact. I will continue to use these food storage containers though. We will just have to make sure that the containers do not tip.