I bought a 60 minute voucher for $98 dollars all excited thinking my teeth will be whiter. When I went there they got me seated and the session started immediately. After about 20 minutes they come in and tell me I have 15 minutes left but u couldn't say anything because I like the bleach thing in my mouth. When the session was finished i asked them why as I bought the 60 minute voucher and they made up all this things about how they sent the machine back to make it more powerful and 30 minutes will be enough. My teeth didn't even change shades , it was the same and they told me I would have to go back 2 - 4 times to get it completely white but I doubt it . Overall, it was not worth the time and money so please don't spend money on something that doesn't work!