I need to find facts on why methadone maintenance treatment is bad?

I am doing a research paper on Methadone maintenance treatment and why it is bad/not good compared to buprenorphine and/or naloxone. Need like 15 pages of information. Any good websites or good sorurse for great info.
I need something where i can read and print so i can show my resourses. Not trying to be a pain

: http://alcoholdrugstreatment.info/i-need-to-find-facts-on-why-methadone-maintenance-treatment-is-bad