Requirements engineering (RE) is widely recognized as a crucial factor for the success of software projects. Therefore, companies often request assessments of RE processes and resulting artifacts to identify issues and improvement potential. However, industry claims that current assessment approaches do not always fulfill their needs regarding efficiency and effectiveness. Motivated by needs of both, companies asking for an assessment, and a company in the role of an assessor, we have developed a lightweight, tool-supported RE assessment approach. Apart from presenting the approach, we also discuss early experiences we gained from applying our assessment approach in real-world industrial projects.