The documentation often seems to be hard to navigate. The search is not always the preferred option, where a more organised and categorised documentation can help.
For example, today I am trying to do calculations with number fields for the first time. I'd simply like to find a page in the 'Manual' and read about it.
I cannot find such a page - just a blog post announcing the feature for GF 1.6.4, but not explaining how it works or how to use it in any way.
I've looked manually, and I've searched various terms based around 'calculating number fields' - all of which show zero results.
We've looked over our notes here and have only successfully used the GF support/documentation for less than 25% of the issues (or rather, simple things that just need a little and quick instruction).
GF Priority Support is excellent, but is not really appropriate to ask 'How do I add two fields together'. This should be something I can learn myself with a short introduction.