Driveline.works Any opinions on them?

I bought a a833 4speed from them when I got it it popped out of 4th and wouldn't go in reverse. I called Joe said send it back. After paying 1600 for it I had to spend 215 to send it back. It came back after a 2 month wait,the same as it was. I tried to call and email no response. I had to take it to a local shop to fix it. I wouldn't buy anything from them.