The text of comments is tiny and hard to read. And, that's on an iPad!
It's so small that one cannot even zoom in enough to make it readable. It does respond well, however, to one of those Font Size bookmarklets. I have one for Font Size 24 and it works like a peach.
Now, when one tries to edit a comment, the comment pops up, but the dialog box is not scrollable, and the tap to to a certain position does not seem to work. One can select text and that is a work around of sorts. I've found it necessary to start typing anywhere and then delete the entered text in order to activate the actual editing, On small comments, I ran into a screen flashing and non-entry issue.
The font size is the more important of the two issues!