Wish I had bought Zima first.
I bought a competitor’s product that stopped working. The manufacturer replaced it but it too stopped working. I’m finished my orthodonture and now use a retainer at night only. I really disliked cleaning my trays with a toothbrush and wanted a new appliance but thought I’d give Zima a try. I like the design which is sleek and neat and so far the unit is performing well.