Negative Positive
Title: A must if you don't have a vacuum system already, and you may want it it if you do
Review: I've had this product for several months now and have been very happy with the value of the product relative to the cost. The stoppers are very durable and have shown no signs of wear. They also hold the seal for well over week (I'm sure they could go longer) on any bottle I through at them. The "click" sound is a nice feature to let you know it's time to stop forcing air out.If you don't have anything like this, it's a great purchase. If you do, and some of my friends do, this one is the best of this kind I've come across.
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