I was advised by friends to try those. The ones you boil and mold (mould?) To your teeth that aren't made for football aren't really good enough. At 20 bucks a pop, and them being chewed through regularly (you have no idea the constant power of your jaw when you are sleeping, as opposed to protecting against occasional bumps to the head in football.)
Maybe you were joking, maybe i 'm a dental prothesis snob. I'm just telling you the advantages of a guard made by a dentist, and the eventual cost.savings.
Break more teeth, see if i care.