My DS had traditional twin track braces on the NHS but due to Covid delays we opted to go private for DD.
We had the same decision to make and decided on Invisalign and honestly it's so much easier. I can't even tell if my DD has them in but the results have been great so far.
Both methods give great results. Both require a retainer to be worn at night after the treatment ends.
We've had to do fewer check ups with Invisalign so it has made things easier.
We have had no soreness whereas DS did have a little bit with with the traditional braces.
DD is delighted as she is very image conscious. DS didn't care that you could see his braces and he even went for different coloured wires each time.
Invisalign does rely on your child remembering to clean them and change them over each week. It's easier to brush the teeth as you just take the retainer out.
The traditional braces can leave the teeth looking discoloured if the brushing technique isn't correct. My DS wasn't the best at that but regular trips to the hygienist sorted that problem out.
My DD was so desperate to see results that she has been really good at doing everything she needs to do.
The best thing is not having to worry about what they can and can't eat as you take the retainer out to eat.
In my experience the £700 extra for the Invisalign has been well worth it.