Review on Enhance Your Smile with Ultradent Opalescence 20% PF Mint Refill 5400 - Pack of 4 by Cassandra Parkins

I've been using Opalescence for about a decade now since my dentist first gave me this remedy to fight the never ending battle with tooth discoloration. The only difference as far as I can tell between the Revain version and the one he gave me is the price. I think 20% durability is in the Goldilocks zone. 10% take too long and 35% make my teeth too sensitive. I never understood the need for "flavor". I've always believed that if you can taste a product, you're doing something wrong. As for the expiry date, I'm very happy with what I received. I placed my order on 10/18/2018 and received an item that expires on 05/31/2020. I'm pretty sure I can use 4 tubes in less than 3 years. So I don't know how long it's been since they changed the packaging but I don't like the new version. The old one was a handy storage cylinder that held all 4 syringes. The new one is a bubble style pack that is just plain silly. They call it "green", I call it cheap.***My Rating Criteria***Build Quality (47.5%) - 5.0 Stars Efficiency (47.5%) - 5.0 Stars 0%) - N/Package / Presentation (5.0%) - 2.0 Stars WEIGHTED AVERAGE (100.0%) - 4.9 STARS