I purchased a GA Batman 25 from MC perhaps 15 years ago and MC graded it 8.0 WP. Upon receiving and grading it, I assigned a grade of 7.5 WP. I submitted it to CGC in 2013 and CGC graded it 7.5 WP. The comic book was not pressed by me or, I was informed, MC. I am not complaining about the grade as a 7.5 for this issue is nice.
Batman 25
0222273001
7.5
Other than that, MC has, unfortunately, been more hit than miss (correction) miss than hit as my grades are lower on, if I recall correctly, all the other raw comic books I have purchased from them. I have not graded any of these others but eventually may since almost all currently sell for substantial amounts in CGC slabs.
I have not purchased raw comic books from MC in approximately 10 years.