The show was Shooting USA and they were comparing the OEM Glock barrel with a drop in BarSto barrel. They were shooting from a ransom rest and, yes, the BarSto did shoot slightly better. The Glock barrel is free, however, as it comes the the weapon and the BarSto was stated to cost $250.
The question to ask yourself is, "Are you shooting at a higher level with your Glock than the standard barrel can deliver?"
Be honest with yourself.
Stated another way, "Can you consistantly shoot one inch groups with five rounds with your stock Glock at seven meters and is that not enough accuracy for your needs?" If you cannot, IMHO, spend the $250 on another training class and/or buy more ammo for practice and forget the BarSto barrel. If you want to shoot lead ammo, a different barrel is required but you can achieve that with much less than $250. Lone Wolf barrels at about $100 would do the job. If you are a world class shooter, then a BarSto is the quality you need and then get a sponsor to buy it for you.
Just my humble opinion.