I have cellular on both my oPad mini 2 and iPad Air 2. Both iPads are 128GB and both mirror each other with the exception of apps that don't use iCloud or what movie I might have currently loaded. I like having the cellular available on both because I never know which iPad I will be using at the time. I use the Air 2 the most, but when portability is most important (like when I don't want to carry a messenger bag or backpack) then the mini comes along instead since it can often fit in my jacket pocket.