Well, there are some notes.
1. This is only if you want to get hax for your console.
2. This is for every online 3DS game, except ones with QR codes.
3. If you already have hax, its fine to update.......Unless you have a New 3DS, and your CFW doesn't support updating past 9.6.0
4. If you want to play online and your 3DS is 11.3.0 and lower, there is a hax that'll let you do so.