PDF Guru earns praise for reliable, no-frills conversions, merging, and compression that save time on reports, invoices, and classwork. Users highlight quick fixes for big files, decent quality retention, and responsive support for login issues. Common knocks: dated UI, messy navigation, occasional upload hiccups, and frustration over paywalls and refund rigidity. Power users appreciate bulk merging and format flexibility, with encryption noted as a plus. Overall: a practical workhorse for frequent, basic PDF tasks—best for speed and simplicity, but expect rough edges and clearer pricing needed.