I am one of the first patients to receive this treatment by my dentist clinic. I must say I felt very blessed to seek for treatment at the right time. I need to talk face-to-face a lot with my colleagues and customers, it must be very uncomfortable and too noticeable with traditional braces.
I must say that it is great! It is not only no one can notice, but being able to remove for eating helps me to:
1. drink less coffee
2. eat only 3 meals (Oops ..)
3. clean my teeth much more often
I recommend to all considering wearing braces, try invisalign instead, it is more expensive than traditional braces, but I think it is worth it.
BTW, the treatment lasts 10 months only for me, I think it'd be 6 months longer with traditional braces.

http://www.invisalign.com.tw/index.html
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