Ugly user interface, but still 5 stars because...

I rarely pay for apps. I only use free apps. But after trying out Adobe PDF Reader and countless other free software I was very frustrated and decided to bite the bullet and spend $5 on GoodReader. This is a review after using it for several weeks:

At first I was horrified at GoodReaders UX/GUI(looks and feel and intuitiveness). If there is anything bad to say about GoodReader it would be the UX/GUI. Its complicated and too utilitarian(ugly)! This is a big powerful PDF tool that requires you to be computer savvy. Beginners will be turned off and confused. Compared to Adobe Reader+Dropbox pair(which work right out of the box and easy to use), there is actually quite a bit of configurations and learning curve you need for GoodReader work for you.

Despite the not so great UX/GUI, I rated GoodReader 5 for one reason: power. It is extremely powerful. Ive gotten it set up so that it syncs with my computer via AFP(like Windows Samba), so that it would sync quickly while my computer does the hard work of syncing with the cloud. That way if I work with a 500MB file, I can sync in less than a minute and work from either my computer or my iPad (without going through the slow cloud like Dropbox).

GoodReader has must have features: pen annotation. I use it with Apple Pencil and LOVE IT. It can also easily cut and paste and reorder pages. Double sided viewing with oddeven start is also quite good esp with my big iPad Pro. Quick all pages view, quick jump, bookmarks, highlight, underline, etc... These are all the basic that youll be using all the time.

In short, this is extremely powerful. But I would only buy it if youre very computer savvy and dont mind the utilitarian UX/GUI.

Appkev about GoodReader PDF Editor & Viewer, v4.12.1