Flexible dentures are not new, I have had partial flexibles for at least 12 years, renewed twice (one upper and one lower). The latest was last year and it did take a while for them to get it right. I asked for Valplast which I had before and was happy with. I was fobbed off with a cheaper but inferior denture. It was only when I threatened to make a formal complain that the dentist agreed to start afresh and I was given a Valplast which I am very happy with. They are not the cheapest but I feel worth the extra for the comfort and secure feeling they have.