A. Very reliable. OCCO is manufactured and tested in the USA. Each machines undergoes many hours of non-stop operational testing before it is shipped to you. We use high quality components and feel proud about the quality of our assembly process, electronics and software design. This said, everything has a life limit. In rare instances DSLRs can die and computer hard drives can develop bad sectors. Luckily, most of what can break in OCCO is not hard to swap out, and there is always help from an expert OCCO technician who will guide you through the process.