Oh man, I remember building GUI apps with it in college. My professor only let me use it on the condition that I could fully explain what every component was doing. I could. I took the generated swing code and added a massive amount of comments, but even having to do that I was still an order of magnitude faster than every other CS student without. A lot of my peers were super jealous that I had so much free time, but they weren't willing to invest time in their tools (gdb, perl, regex, sql, etc). It was quite the force multiplier.