Recently, I often use the toolbox you mentioned. But I found that it consumes much time when using fuzzy-rough set. To learn 3000 instances and classify 1000 instances with 14 features, it spends nearly 10 minutes. Other classifier like kNN, SVM, Bayes, Decision tree (also run on R studio) that I tried need just some seconds. Do you have any ideas? Is that problem of rough set or problem of the package?