I've always had an insecurity about my teeth, and a friend recommended Zenyum to me, citing their affordability. And indeed, Zenyum is very competitively-priced - costing about a fraction of bigger brands like Invisalign. Their clear retainers are of pretty good quality, and their staff are very friendly. You can monitor your treatment progress via its intuitive app. I'm very happy with how my teeth has shifted after my whole Zenyum treatment! Highly recommended if you're looking at an affordable and trustable clear aligner company!