I've been going to Sibu Hair since it opened in the early naughties (2003-ish).
Sibu has a great atmosphere. Mostly young women, you're always greeted with a smile, and everyone's polite. You can get all hair treatments in a relaxed, trendy environment. Unlike other high class hairdressers, all staff are fun, friendly and don't give you the 'up-and-down' if you turn up in jeans.
Most of my family (3yr old niece, brother and mum) and a lot of family friends go to Sibu.
Give it go!! It's fantastic :)