i dont think it worth joining, especially i have to pay to get the membership. you get points by going to their functions and lectures, if you managed to collect a certain number of points they will issue you a certificate, which for me is useless. also for the points you collected, it will reset back to zero by the time you moved to the next academic year. ie say you collect 4 points in 1st yr and you dont have enough points to get the cert, by the time you reach 2nd yr, your points will be reset to zero. so all your hard work in 1st yr just wasted. you may have time to go to their functions and event in 1st yr, but by the time you get to 2nd, 3rd and 4th year, you will hardly get anytime to do anything apart from studying if you want to get a decent grade in pharmacy. btw all my potential employers never ask me anything about bpsa cert or anything related to bpsa.
i think British pharmacy conference (BPC) is more worth going than joining bpsa. bpc is a conference that happen every year for pharmacist. google it or check pj.