The ATEQ VT55, the same tool used by SMP and NAPA, is the best tool on the market. Why, the ATEQ tool is easy to use, the ABOUT feature allows us to use the tool as a diagnostic tool and a management tool, the HIDE feature allows us to consolidate makes and models of vehicles to a small group for fleet applications, the software flow with relearn instructions and part numbers save time and money, and the DTC codes available on the screen are a plus too. PLUS, the VT55 can clone sensor IDs electronically or manually...this is a great feature with so many sensor batteries dying.