I decided to try these folks when my long time mechanic told me my car's transmission was shot and I'd need to pay $6500 for a rebuilt one. I thought I'd get a second opinion. At first Hi-Tech said the same ... $6500 but then they got to digging in and looking at the engine/transmission and found that there was a vacuum line malfunction and valve that was gunked up and recommended I pay $300 for a transmission flush with added lubricant (they admitted it was a gamble) and a few other maintenance items that were over due. In the end I paid $1100 and the car is like new! They went over everything in detail with me so I had a firm understanding and also had me test drive the car with the mechanic riding along. Custom Service extraordinaire! I'm very happy.