Product review (5 stars): All you need in one kit
When we purchased a Whirlpool side by side fridge recently, the produce preserver was not included as a feature. This kit easily remedied  that issue. The holder which sticks to the back wall of the produce drawer takes both of the packs sent in the kit. It is really too early to tell how much of a difference it makes in the lifetime of my fruit and vegetables.  Time will tell. However, the starter kit is an easy add on to almost any refrigerator with combined produce drawer, or with two separate drawers. Of course, with two produce drawers, it would be advisable to order two starter kits.

One feature that I cannot attest to at this time, is the warning when replacement of the two packs is imminent, to allow the owner to order replacements. I read that it is effective for six months, same length of time as the water filter. Of course, appliance sellers such as Sears or big box stores will sell this, but I found it more convenient to order from Amazon...which requires NO trip to the mall. As well, there is no sales tax, a 10% savings immediately....with Amazon's price competitive with all local sellers.

When the time comes to refresh my preserver packs, I'll reorder from Amazon.