What you actually get
A Word document containing the PDF's text, with headings, paragraph breaks, bold and italic preserved, and a page break between each original page. It is editable, searchable, and opens in Word, Google Docs, LibreOffice or Pages.
What it is not is a pixel-perfect reproduction. This is worth understanding, because every converter has the same limit and most don't say so: a PDF does not contain paragraphs. It contains instructions to draw specific glyphs at specific coordinates. Reconstructing a document structure from those coordinates is inference, and inference has edges.
Where it struggles
Multi-column layouts — academic papers, newsletters — are read in coordinate order, so columns can interleave. Tables become sequences of paragraphs, since the table structure was never stored. Text inside images is invisible to text extraction entirely.
Scanned documents contain no text at all — just pictures of it. We detect that case and tell you, rather than handing over a blank document. Reading a scan requires OCR, which is on the roadmap.
Why other converters seem better
Services with much higher fidelity do the work on a server, usually with a full Office or LibreOffice installation — which means uploading your document to a machine you don't control. That trade is exactly what this site exists to avoid. For contracts, medical records or anything confidential, a good-enough conversion that never leaves your laptop is the better deal.