I would like to say that in my opinion Australia Express has done a phenominal job.
I think most applicants dont really realize what they are signing up for when openeing a visa case - YES there are fees involved, for some people it may even be out of thier price range.
From my first call with Austalia Express after i inquired, they quoted me that their service fees range between $1800-$5900 USD depending on the visa case, which to my knowlege is more or less industry standard.
I was also concerned regarding some of the reviews that i saw here, but when I spoke to them they were able to clarify everything and provide me with the lisencing information for some of thier partnered MARA agents.
Like everything in life there were some bumps on the way and its been a long journey so far, but i have recently submitted my EOI with Australia Express, and now I am just waiting for my invitation.
I would reccomend using them in the future, and if you are considering going with them be open and ask questions, they were very transparent when asked.