Very cool, thx. It even works with my 20 YO LaserJet 5MP. The instructions for printing a web page are not quite right but I figured it out. iOS8 gets rids of the http:// in a web address so you have to put phttp:// in front of the web address then hit Go on the keypad and the page will open up in Printer Pro to print.
For printing email you have to select the text and copy, then Printer Pro will print what is on the clipboard.
It's a bit slow for web pages and complicated docs but it works, it has to parse a lot of data though. Could be my phone, 4s.