Bought one of this recently, no issues with the control unit but the soldering tips quality isn't good. Four tips presenting random open circuit error messages and the C115-IS tip is short circuited. Horrible customer service based on an AI chatbot whom never answer your questions and when you manage to talk to someone from the store they tried to say it was my fault due to warming up the tips without tin or solder, how is it possible if the shorted one was never been hot? I am very disappointed with this Phonefix store, they are trying to push me to order more products from them to get an spare to replace the damaged tip. I won't return the full item due the base is solid and the handles ok, but will buy some original JBC tips to replace the bad quality ones they sent.