There are 3 of us in this family who can heartily recommend Sam and the Practice. Both my husband and I had overcrowded mouths and had to have 4 teeth out and then a brace as children, so it was inevitable that my 2 boys would need orthodontic treatment. However Sam managed to achieve perfect smiles for them with no extractions! It was a bit of a slog, with the jaw expander first (I think that might be what you call the quadhelix?), then a fixed train-tracks brace, head-gear, elastics, etc, but as long as they follow the instructions, he can achieve miracles. And even though my younger son had extra complications and needed more sessions, he never charged more than his original quote.
The third one in the family is me. My teeth have been shuffling around and turning as an adult, so I am just finishing orthodontic treatment with Sam too, after seeing the results for my kids. It's not been much fun wearing a fixed brace, but it comes off next month and my teeth will look amazing. So I'm sure it will all work out well for your daughter, good luck to her!