Problems
You will find the best way to print from an IPad is to buy a new printer with AirPrint. There are many out there now and they can be had for around $80 bucks. Otherwise with most apps you have to email the file to yourself and print it from there, if you have a wireless printer hooked up to your wifi. No wireless printer on your wifi network? Don't know what you do unless your friend has a wireless printer with an email address so you can send it to his printer.
Another example of problems with what could be a fantastic device. IPad's are not a business type computer, they are centered around media and intertainment. Great for watching Netflix in bed, but not a total replacement for your laptop.