I have played LoL on my i7 and it runs quite well. I do play with it plugged in though. I have also played other games such as Path of Exile and Portal 2. It performs exceptionally as a student device as well. I went through 7 different laptops before I found the SP3. For my use case, it was the only true solution.
I'm doing my python programming on my i3. So far no problems. I don't use my Sp3 to write down notes though. I still prefer paper because I am from a different generation. But I do store the lecture powerpoints on it so I can view it anytime.
I haven't played games on it yet because I seldom play PC games...I'm a console person. Though I have seen someone in youtube test skyrim on an i3 version