Charmosa is a great place to have any treatment done. I'm a regular for waxing but Nga and her team mates Lisa and Laura are professional, expert, and also really lovely company. I couldn't recommend it too highly - try it for yourself and see.
My first time having a shellac pedicure here and whilst my therapist was very nice I felt the place lacked atmosphere and the pedicure felt rushed. It was supposed to be a 50 minute treatment but I was in and out in 35 minutes and whilst my toes did look nice it was disappointing overall.