I sought orthotropic treatment for dd1 - couldn't get into London, found an orthodontist who is an othtropic supporter but he only did 100% private work so treatment cost would have been £6.5k!!!!!
The NHS orthodontists all wanted to leave things as they were and see what happened when she was 14 - this was despite the fact she has a significant underbite which if bracing doesn't fix your talking have jaw broken and wired.
Private bloke said yes he wasn't surprise and probably what would happen at 14 is that they would take teeth out and stick brace on rather than do expansion work as by then it would be too little too late.
Fortunately dd got to see a 3rd orthodontist just before she turned 12 as we moved areas. I paid for the intitial appointment to get seen quicker. I went in saying she needs expansion etc. He said lots of negatives about expansion etc etc. He looked in mouth and agreed yes let's try it quick and hope we're not too late.
Outcome is that I had to pay £500 for a private skeletal expansion brace (different to a dental expansion brace) he has done the rest of the work on the NHS, not sure how he has managed this but I am very happy. Less than a year on expansion is complete, she no longer has underbite, she has train tracks on the top and will be moving to retainer soon. Best of all it dropped her palate down so for the first time in her life she can breath through her nose!
I am very pleased, I had 8 adult teeth removed to make room because I have a small jaw, my smile is hideous as my mouth is narrow it's not an attractive look.
If you can afford orthotropics I'd go for it!