I never soldered before, and so bought a usb clock kit to practice and desoldered a video card's caps before doing this, but ya, this was still hard. The sound caps are sooo hard for a beginner. I did do it and it was totally worth it, tho. Doing the mainboard took the GG from line-filled mess with no sound or game that turned off to stable blank video that didn't turn off. Then doing the powerboard made a game work! But, with low sound. And, two other games didn't work (had to clean contacts by opening cart and using alcohol). Then, the hardest part, the sound. Did that and powered it on expecting nothing--but it worked! These caps are great if you have the time and skill to use them. My GG is back to 80% of brand new right now, and fixing it myself was very intimate and rewarding.
Even though a lot of the original capacitors are weird rectangular shapes, the cylindrical ones in this kit are either the same size or smaller so they fit right in place. I will definitely get more in the future when I need them.