Few years with pdffiller I am their client for almost 3 years. I did my best to get how it works and was making bad reviews in appstore because complicated ui on the start. I was checking out competiting editors, but I could say that other apps were even more complicated. Many things changed from that time and editor became much more user friendly, got new options for saving money and time. I am less about challenging their customer service but sometimes updates are a bit confusing.

When I chatted with support When I chatted with support, I had had two different people who took the files I had been trying to merge unsuccessfully and merge them for me!!! Similarly when I had trouble with blank pages and missing pages in a merged document I found out it was because I was using Edge as my browser instead of Chrome. It would have been best if that had been in the program itself, but support really came through to help me out.