My corporate laptop is a PC using Outlook 2007. Like everybody else, if being mobile was the only challenge then the limited amount of space you can keep on the server that forces one to use PST files; would be a non-issue. Who wants to fire up a non-SSD laptop? ... Not me. thats why I bought an iPad. So keeping the flow of information on all my portals updated became the challenge. I looked at reformatting an external hard drive in "exFat" so I could transfer pst files between my Mac and pc but the more I looked into it the more complicated it became. In effect i eliminated having to use my Mac to keep my ipad updated with my pc (as it pertains to outlook formatted emails). This Pst Mail is the real deal. I send and receive email on my iphone / ipad just like normal. But anytime I need to reference emails that are off network in pst files i have quick access using Pst Mail and can forward those same document(s) from apples native email software. Let me clarify i still prefer to use Outlook in the evening when i get home in order to keep my project correspondence nice and tidey. But now after i finish working my emails i sync my ipad with my pc using Pst Mail Sync over wifi and voila everything is now on good to go. It is brilliant! I had to do a little work up front because my PST file is upwards of 15 gigs. So I created 4 smaller pst files so that the document(s) would be easier to move around. The companies tech support is through email but found them to be very helpful, up to speed w/ their capabilities. in fact the gentleman that helped me is named Javier. Thank you so much! I would definitely recommend using this product.