Toothsi aligners

Has anyone used toothsi aligners? I have one misaligned tooth and a deep bite. I booked a scan today and they quoted 55k. For aligners and retainers. Aligners for 7-8 months and retainers for a year. All of which is covered in this. When I asked my orthodontist he quoted about 1.5-2 lakhs. The massive price difference is making me incline towards toothsi but I want to be sure before going ahead with it.