I obtained this with a specific project in mind: Editing about 35 spec sheets that were in PDF format and that my client needed altered slightly to their requirements.
Generally, editing text was fine; things worked as expected and, when they didn't, I could easily determine the reason and/or a workaround. However, one of the requirements was to insert the client's logo onto each page. Pasting the 500px-wide image resulted in the image covering the entire page! This wouldn't be a show-stopper because I could then just resize the image. However, the tool provided for this purpose won't resize the image proportionately! So, I'm left trying to guess at a suitable proportion and it's taking far more time than it should. Something as basic as this should be in the product at the outset. No go!