Thanks. I'm looking at a brand called BriteSmile that is offered at a few local dentist offices in my area. It's actually not for me--I think my teeth color is quite good--I may have a routine cleaning. It's for my husband. I don't think he's ever had a very proper cleaning of his teeth. Dental health in HK really isn't like what it is where I'm from. People seem to not really care that much about their teeth here--I've seen some professionals that depend on their face-to-face interactions with people with really messed up teeth--crooked, rotted, very stained.... So, thinking of this for my husband. If I can do it for $3,000 HKD or under, that would be ideal.