I studied the text Jami’ ul ‘Uloom wal Hikam- Ibn Rajab, under Ustadh Abu Safiyyah, a while ago. He is a teacher that has a very good style of teaching. I’d say from all the teachers that I’ve studied under, he’s definitely one of the most reliable/well mannered. I’ve benefitted from his passion for Hadith and the sunnah as well as his knowledge itself. He speaks from authentic sources only quoting the scholars of the sunnah as per the understanding of the salaf. I would definitely testify in respect to his teaching.