The ArrayExpress team has compiled a user survey with the aim of collecting feedback on the usability of the ArrayExpess Archive of functional genomic experiments (http://www.ebi.ac.uk/arrayexpress) and the Gene Expression Atlas which contains a subset of Archive data that can be queried for condition-specific gene expression patterns across experiments (http://www.ebi.ac.uk/gxa). The survey will allow us to improve our submission and query tools and to tailor our training resources to users' needs. We would be grateful if you could spend a few minutes completing it. The survey can be found at: http://www.surveymonkey.com/s/ArrayExpress. Many thanks for your time. Best regards, The ArrayExpress Team If you have any questions or comments please email arrayexpress at ebi.ac.uk.