This is definitely one of those "everyone is different" situations.
I know people who have an expensive unlimited data plan (usually because they got the iDevice for nothing if they signed up for it, not bothering to work out that they could buy the device for 9-months of what the 24 month contract costs) and probably only use a couple of hundred Mb of it because they are on home or public wireless most of the time. They are the sort of people I see benefiting from this unless the price is significantly higher than the standard Apple price for the same device.
I'm on a plan that gives me 1.5Gb. Despite being a fairly heavy user a lot of my use is also over WiFi. Many months I use no more than 0.5Gb, but when I'm out and about more I sometimes get close to the full 1.5.
Conversely I know someone who blows through several Gb every month without fail. To be honest I'm not entirely sure how given his lifestyle (from a technology PoV at least) isn't particularly different to mine, but it shows that one size certainly does not fit all.
> To be honest I'm not entirely sure how given his lifestyle (from a technology PoV at least) isn't particularly different to mine, but it shows that one size certainly does not fit all.
Might just be that he doesn't use much wifi for some reason. Because of my pretty high data cap, I've never bothered to setup a wifi AP in my flat, my computers are all wired so the AP would mostly be useful for the phone, which can generally use 3G/LTE.
Well, do you use leave it on for a long time? I generally use 2-3 times a week on the phone, at most 30 minutes. I do occasionally browse a couple Youtube video (short one though). I usually end up with 50MB~100MB.
Meanwhile mine has 2GB and I generally use 80~90% of it.