I'm fuzzy on my memory, but man! This was so much cooler and better than disassembling stuff on the commandline! The cool thing about IDA that I found out are:
- its scripting language (we used Python)
- its ability to show loops and branches by drawing arrows to other pieces of assembly (it's a special view you can use)
- really good search and code labeling features: if you change on register name somewhere, then that's propagated to where that register is used in the rest of the relevant code
- the ability to patch programs: you can overwrite processor instructions, mostly I used instruction 90 which is the nop instruction (meaning: no operation).
These features are not unique to IDA, but from a beginner perspective: I thought they were awesome! We used some kind of demo version for IDA.