hmmm, if it's a requirement sis, parang you have no choice din but to take the exam.. are you asking the review or yung mismong exam if worth it? I already took this exam last year! nakakainis nga ang exam na to kasi di ba.. 2 years lang ang validity! what ba need mong BUN score? 7 and above ba?
it's your choice if you like to enroll sa mga review centers, they will really help you on the techniques..usually, 1 week lang ang mismong course ng review, some offers unlimited review! basic english grammar.
IELTS as you may already know consist of 4 exams, Listening, Reading, Writing and Speaking.. ang pinakamahirap (according na din sa iba) is Writing and Speaking..