Description of the content of folder "SURF_replication_package": 1) "Experiment I" contains: a) the folder "summaries" which contains all the html summaries generated through SURF and browsed by study participants involved in the Experiment I. b) the folder "XMLreviews" which contains, for each of the apps involved in the Experiment I, the corresponding XML file containing all the collected reviews for that app. These xml files have been used as input files for the SURF tool for generating the summaries contained in the "summaries" folder c) "Experiment_I_results.xlsx" which contains all the answers to our survey collected from the Experiment I participants. 2) "Experiment II" contains: a) the folder "summaries" which contains the two html summaries generated through SURF and browsed by study participants in the Experiment II. b) the folder "XMLreviews" which contains, for each of the two apps involved in the Experiment II, the corresponding XML file containing all the collected reviews for that app. These xml files have been used as input of the SURF tool for generating the summaries contained in the "summaries" folder. c) "Experiment_II_results.xlsx" which contains all the user feedbacks extracted/validated by survey participants in the two sub-experiments. d) "Experiment_II_survey_answers.xlsx" which contains all the answers to our survey collected in the Experiment II participants. 3) "Survey.pdf" which contains the pdf version of the survey performed by the participants 4) "SURF_tool.zip" contains: a) "SURF.jar", which contains the class files of a prototypical implementation of SURF b) "README.txt" which contains the instructions to run the SURF tool c) the "lib" folder, which contains all the java libraries needed for running SURF.