I looked at doing this! Do not bother!!! Why? Because there’s no one who checks up on your teeth at least with an actual dentist if they don’t follow or track they make you new sets, they check in, they track them. I got Invisalign and it’s been worth
every pound.
Also the person who did my scans/appointment for smile was literally a wannabe sales person. Couldn’t answer any of the questions I asked. Also my appointment was in a random we work building in London.