The product works very well, and I like that you can use the same solution mix for a week. There was one big issue for me, and it was just with the instructions. The only instructions you get are on the box. It explains how to make the solution, and that it will last a week. But there's one thing, no where does it say "leave containers in solution FOR 15 MINUTES AND TAKE OUT".
I was under the assumption that you would leave your retainers in there all day (since the solution lasts a week) So when I left my retainers in there for over an hour, they turned blue! They were ok, most of the blue came off when is washed them with water, and the rest came off a few days later. I went back online, and they had better instructions, and it does say that you shouldn't leave the retainers in for longer than 15 minutes.
But the actual product is great, it really cleans well, a lot of the white stuff that had built up on my retainers over the years is coming off (not at once but I can see the changes.) And the retainers just feel cleaner when I wear them at night now. Would recommend, just make sure you leave them in for 15 minutes and take them out.
Merchant Response:The instructions on our website say: "After soaking your retainer for 15 minutes, rinse it with cool water. The manufacturer advises that you do not soak your appliance more than the recommended 15 minutes."