The board is technically in one piece that looks a little like a Fat "L". Plugged into that board are a couple other boards, along with NFC plate, that don't need to be removed from the system if you are careful. The biggest PITA is at the top right of the board itself. There are three ribbon cables literally on top of eachother, 2 of them are actually on top of eachother (strangass design) and one is on the other side. Just be aware of this because you won't see the one cable on the other side until you have flipped it over.
The iPhone screwdrivers MIGHT be a little too small, though I have worked on very few iPhones since the priginal since the opporunity never arose. If you have worked on the "old" 3DS xl, you will probably be just fine. This is more difficult, I would say, but only because of the ribbon cables that are small, thin, and can break easily if pulled or tweaked. I do recommend some fine ipped tweezers as well. I used my wife's brow tweezer (shhhhhhhh don't tell) but wished I had something nicer. Something with soft tips would have been a damn godsend lol.