I have an iPad, and I love it. I use it as much as I can, but I generally still need a laptop to finish up my shops.
1) I don't like typing on my iPad, so I use Word with spellcheck for my narratives.
2) This may be user error, but I don't know how to save a completed report on my iPad. On the laptop, I print all of my finished reports to PDF, so I have an electronic copy.
3) With some shop reports, I cannot upload multiple photos from my iPad. This could also be user error, but I don't know how to name them. Some shops refuse to accept more than one photo from the iPad. I have to go to the laptop, save the photo with a unique name to the disk, and then upload. It is so much easier when I am able to do it from the iPad.
It also use both at the same time when completing reports. If I am typing a narrative on the laptop, I refer to the questionnaire on the iPad.
I have to say that the iPad is one of the best purchases I have ever made, for general ease of use compared to a computer.