VPRO5 & Clear Correct - does this work?

I have just started Clear Correct and want to get this over and done with as fast as possible. I have seen various reviews of VPRO5 where the patients using it say they change their trays weekly instead of fortnightly. When I asked my dentist about this, it was like he didn't know anything about it, so nothing else became of it. I want to find out if this works, and if it does I will raise it again with him. Thanks.