Another site is ieltsanswers.com The guy here is an examiner for IELTS and he can give you a lot of feedback from an examiner's perspectve.
He gives feedback based on the grading criteria. He helped me prepare for the General exam, but He also does the academic exam as well.
I used the service I mentioned above. Originally my score was only 6, and I used that serivce to get to 7. Now I find I need an 8 becasue of the new immigration rules to Australia, I will keep using that IELTSanswers.com service