They require a precise placement in the senseo brewer to avoid leakage but we have found a easy way to accomplish that by pre moistening the pod lightly before installing it in the brewer.
Not to disagree with former review, but he/she just doesn't know good coffee!!
We use this product on a regular basis. I have an auto-order for it. there are 12 boxes of 18 pods in a case. Hope this helps.