Good morning, I am trying to decide between the wifi or cellular iPad 4. First of all, I'm going to be using this mainly in hospitals and class. I know for certain that all of the lecture halls have wifi access. I do not know if the hospitals do; I imagine newer hospitals do, while older or rural hospitals don't. Can any hospital employees comment on wifi availability in hospitals? Or maybe they have VPNs? I also have an iPhone 4, so my understanding is that I can make a personal hotspot, and then connect my ipad to the internet using the iPad wifi-iPhone interaction. However, I obviously do not have any experience with this. Is data usage for web browsing similar between the iPad and iPhone? As I said above, my main usage will be in lecture halls and hospitals, as well as at home (wifi enabled, obviously). However, I can see how having cellular in say, a waiting room, or a parking lot (when waiting for someone) would be handy for web browsing to kill time. I wouldn't be watching Netflix or streaming other media. So is it worth the extra $100 ish to upgrade to cellular? Or would it make more sense to tether to the iPhone when I need data? Thanks for your input.