Abstract--For two decades, feature diagrams have been intensively studied as a means to specify variability and pilot configuration in software product line engineering. Surprisingly though, it seems that very few reports on the use of feature diagrams in practice are available. To test this claim, we started a systematic review of such reports. In the collected material, we tried to identify positive and negative feedback on the use of feature diagrams. In this paper, we present the first results of this work in progress and discuss the opportunity of extending it to a fully systematic review on a wider scale.