Writing reports is easy, the best solution is Documents To Go which allows you to compose in the Microdoft Word format. Other office suites have that capability but lack some basic features. Getting documents on and off requires either sending them (by email or to some online storage page such as dropbox) or transferring them via iTunes. Currently you can't print directly from the iPad because there's nowhere to insert printer cables, but they're working on a solution.
I use it almost exclusively for writing reports, etc. It saves me time and space.