Currently there are two ways you can use to get full access to your wii u to do whatever you want to it they are iosu cfw and rednand respectively. This thread is mainly for newcomers unsure of what to install on their brand new haxorz machines. On this Thread I will post there pro's and con's for each one and update them as time goes on. Eventually once boot 0 cfw comes out iosu CFW will obvs win so rednand will become redundant but for now its still useful so wait until then. Why do I want any cfw? The main reason you would want custom firmware is to install unsigned tickets for things like eshop titles and DLC. You can also install Regionhax allowing you to run any game region free forever. Atm its not very useful to the end user just for experimenting really IOSU CFW Pros Warning: Spoilers inside! sd card of any size will work with this uses only 14MB on sd compared to the 8GB/32GB of redNAND Works with vWii titles installed with Wup installer SD card can be removed while in operation without utter anihilation Can return to stock any time (those it for you on every reboot lol) Cons Warning: Spoilers inside! Not 100% safe as it mods sysNAND only temporarly and to reactivate the mods (sig patches etc.) has to be launched again. This makes it so if you modified some critical file incorrectly your wii U will become a fancy black/white brick Can't install sysConfig Tool as it is a system title REDNAND Pros Warning: Spoilers inside! Should be completely safe to mod anything without worry of brick as you can revert from backup works with Official Sysconfig Tool(Modified one availble in the wild that works on sysNAND not recommended to install thought) Cons Warning: Spoilers inside! 64GB(black/premium)16GB(white/basic) sd card or higher required to install Dumping your system can take between 1-9 hours depending on your NAND/SD setup System will be limited to the speeds of your sd card so a slow sd will dramatically effect load times Can't format without bricking if you want to return to stock you will lose everything you have done on your redNAND, this includes all title installs and save data (wupserver can be used to transfer saves but not titles) UNCOFIRMED:According to the current information we have it can never be updated due to the SEEPROM memory not being redirected correctly on REDNAND and once it checks last run latest firmware it will brick unless sysNAND is same firmware For anyone that is unaware you can install unsigned titles of any kind on both just fine(includes eshop only titles,DLC etc.) NUSpacker on sysNAND now works if you use @Maschell 's fork here If you feel I have left any pros or cons out feel free to leave a reply with what I missed You can weight out what is best for yourself from these pros and cons, the current iosuhax cfw I use can be found here and is maintained by @FIX94 and for redNAND installs the recommended fork is @dimok 's one here , neither of these could have been possible without @smealum so thank him for his work too.