If you are looking to alter your bite, I would suggest going to an orthodontist. You can spend a small amount of money buying fakes, only to have your bite changed a small amount. If your bite changes, it can do more harm to your teeth than you want. If you go to an orthodontist, that person can do the same thing correctly and it won't cost you that much more in the end.
I had fakes for several years, because my bite wasn't bad enough to need braces. Several years ago I had some dental work done and my bite shifted after the work was done. I talked to an orthodontist about what could be done, and it was decided that I could get braces.
I do not regret getting the fake braces, but I really enjoy having the real braces more. For me having the real braces are far more pleasant than the fake braces ever were. I talked with my orthodontist about extending my time in braces for a little longer, and he has agreed to do that. I have a medical reason for asking him to do that not related to my dental issues.
