Giant Steps is quite popular for being an incredibly difficult song to play seeing as it's a string of II, V, I chord changes in three different keys, among other changes that are inherent in the song. Thanks for making our lives more difficult Coltrane! If you're having trouble making your way around the neck and improvising this video can help! He talks about similar tonalities out of each chord change and scale connection between different keys. Just be careful because the audio goes out of sync around the 2:40 mark and from there it's probably best just to listen!