Another throttle body spacer question.
 

Now i know ya'll are probaly sick and tired of hearing this never ending argument over peoples gains and flaws. but this question is just strictly to people who have either tried it on there chevrolet 5.3 or know someone who has.
My question is what gains and losses has anyone had from any throttle body spacer they have installed on there 5.3 and can you please share and maybe give us all a little review.

thanks guys