@bait0211 : hi! I cannot recall where I read it from, but IDP was favored over BC, so I went ahead and took my 1st IELTS with IDP in Oct last year. Was short of 0.5 in my writing, so I took another one just last Dec 2014, again with IDP. Still short of 0.5 in my writing, so I took a break.
Then after I reviewed my notes again, I decided to try BC, since I know BC is a good institution way back in Manila. There will always be several factors why I got my score this time around, but I can't help but wonder what could have been my scores had I tried BC the 1st time.
Since I already have a family, I opted to save my money and reviewed on my own. But I know someone who took the BC review classes and it costs more or less 1k sgd. God bless on your next take!