Didn't know they were available until I saw this post. Just ordered 300 of them. Been using sani-chips myself for about 5 years, and no real complaints with that. But besides ease of cleaning, the two things I am hoping for with these pre-cut liners are being able to (a) reduce flexwatt temps a bit and (b) free up a little more head room for the bigger adults. So can't help you with your question, least not for awhile, but thanks for alerting me to the availability of this product. Can't wait to try them...Dave

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