I had a couple issues working with UITableView. I had been stuck on these problems for several hours before asking for help.
Alex was kind - he listened to my problem, while diving into the code. He understood very quickly where the problem was, and showed me how to narrow down the issue. While fixing my problem, he also showed me some new development & debugging tools that I wasn't familiar with.
In summary; he solved my issue and answered all my questions. He introduced me to some new tools. He worked quickly and efficiently.
I couldn't have been happier with my session. I will definitely be using Alex again.