Gaming Vest: feel the impact of being shot or getting stabbed

Some times in FPS games you just dive into the action and do not care about shot or stabbed as, well you are not going to die or get hurt over it. Well the Gaming Vest aims to change all that, the wearer will feel the immediate, direct impact of being shot or getting stabbed while playing FPS games.

You can view a video below of a girl testing the new gadget out, can you imagine what this will feel like while playing Halo or Bioshock.

So if gamers would avoid being shot while wearing the vest, would this make them a better or worse player overall?