2000BlkGtConvgobucks

Has anybody used the shop called Gearheadz that's located on the east side of Columbus, Ohio? I'm thinking about taking my car there to have the 4.10's installed that have been sitting on my floor for the last 6 months. I have done all my work on my car until now so i don't know another good mechanic other than me I was confident about swapping the gears until i read some really bad stories about other people attempting them for the first time. I finally decided i would rather pay someone for the warranty and the piece of mind, especially since ive read that its only a few hundred bucks for the install. Any help with columbus local shops would be appreciated, thanks in advance.