A real Tech 2 will cost in the thousands to buy all the parts. The China knockoff Tech 2 will NOT hold up in a real shop environment where it is used every day and would therefore be a waste of money for a professional. For home use where it might get used once every few months, it will hold up fine. Most aftermarket shops will invest in a high end aftermarket scanner because it would cost a fortune to buy every manufacturer’s genuine scan tools plus all the subscriptions to make them work. Most aftermarket shops also don’t specialize in one brand, if you want specialized you go to the dealer.