Our metal-bending shop supervisors have been using iPads for several months now to great success. We started with one unit in the spring, and added 8 more in late August. So far we have not lost any (neither to rough handling nor otherwise).
We still print large drawings, but the iPads did away with all our printed procedures, and many of our work orders and printed drawings. But beside these expected benefits, we are seeing lots of other not so obvious effects.
For example, there is enhanced consultation from the users. The median supervisor-user "hits" the QMS 45 times per week and visits project wikis about the same number of times. They are much better informed of jobs' status, schedule, problems, solutions.
They are also contributing to discussions and CA resolution, but not so much directly on the iPads. The median supervisor edits the wiki or the CAPA database only a couple of times per month from his iPad. They seem to prefer to come into the office and discuss directly with the engineers or manager. Doubt it's because of any issues with the touchscreen, tho.
Best part is that they and their workers feel now in the loop, aware of news and able to see the latest pretty pictures of completed jobs. Even during the recent Christmas party it was funny to see that several of the supervisors, not previously known for their love of computers, were carrying their little toys around.