High level of communication with the customer. Both by phone and by mail. He knows his work very well. Available explains things that may not be obvious to the customer.
Specifically on this project a bit delayed with the deadlines, so the score on the deadlines is not the highest. But when the dates began to really push me, then at my request it finished everything quickly, so it was still high 🙂
Correction was taken into account and implemented quickly.