I have heard nothing but bad news about them. I had a customer that bought an engine from them because he thought my price of $650 was too much. He installed it himself and did a beautiful job but it was really noisy. He brought in the next week for me to diagnose and I discovered no oil to the rocker shaft a little too late. They installed the rear cam bearing 90 degrees off cutting the oil supply to the shaft and trashing the shaft, rocker arms, and sending all the metal into the oil pan.
They made him pull it out, send it to them, and then two weeks later they got him a new motor and offered a hundred bucks for his labor to pull it out and re install it. also the motor he got was .60 over and the crank was .30 under.
Todd