I got aligners back in March of this year. Started off well and when you get braces they are numbered 1-20 etc . Every two weeks you change too or bottom brace . Anyway long story but after number 8 they didn’t really work on the bottom . I was throwing out my aligners after use as I didn’t know you have to keep them my bad . When I had my check up which I arranged myself as I don’t upload pics etc or do much with computers . They told me bottom one didn’t work properly and as I didn’t keep my old braces have to pay €55 per brace for bottom from number 8-14 . I paid for this to make my teeth straight and on the bottom it certainly didn’t work and on top I’m not overly happy either . And the way they treat you when you dare question them is not very pleasant. I wouldn’t be rushing to smile life to fix your teeth . At the start I wasn’t told exactly what to do and in the end my teeth are not straight and they are not very helpful, just requesting more money off me