It was a great time while I was working side-by-side with Sergey. He is very open-minded person always looking for something new -- new tool or new approach. He is headed to better services for clients and better work organization inside a team. His energy moves rocks. Coupled with deep understanding of python's guts it is great force to move project forward.Sergey is very attentive in personal communication and it is real joy to have fun times with him. Even pair programming can be both fun and productive.