Reviewers consistently say KlearStack makes document processing much easier, especially for invoices, receipts, expense reports, and other finance documents. They praise its ease of use, strong UX, fast OCR and extraction, and ability to handle varied document formats without templates or regex rules. Several also highlight responsive customer support, fewer errors, lower manual effort, and time or cost savings at scale across teams. The feedback is one-sided and highly positive, with no meaningful criticisms mentioned, so the clearest takeaway is efficient, reliable automation for document-heavy workflows.