MetaCentrum Cloud provides an infrastructure as a-service for scientific users, working in international projects supported by e-INFRA CZ (Czech national e-infrastructure, see also https://www.e-infra.cz/). It provides an easy to use admin web interface and a programmable API for managing virtual machines, networks, and storage. Internally based on OpenStack it supports advanced usage patterns including support of complex virtual networks, object storage and access to GP-GPU. The providers, CESNET and CERIT-SC have a long history of providing e-infrastructure services to support a broad range of scientific workflows. The user can expect skilled support staff and even collaboration on the use case optimization.