Not very good
It only converts 1-2 pages with the free version. It converted that for my pdf spreadsheet but the excel file had a lot of text in the wrong place (cell columns merged that shouldn’t have been and inconsistency with that). It also did the same thing other converter apps have done so far, which is to take a cell with two lines of text and make it into two cells (cutting email addresses and mailing addresses in half). If your pdf is a very simple, straightforward spreadsheet maybe it would handle it. Otherwise keep looking!