EbscoHost

So this is the one part of Marvel I feel like I'm pretty comfortable with. I use it fairly regularly with students and to find articles when teachers ask me for things for their classes. I was surprised that you didn't mention using MAS Ultra School Edition as well as Middle Search Plus for school since this says it's for high school students, which I frequently point out to students. I don't often search for only scholarly reviewed articles, but do have good success finding articles for teachers to use with students for non-fiction reading when paired with English reading or to support teaching in history or science class.
When I looked at the publications list I searched for Consumer Reports and found it in both Academic Search Complete, which surprised me and MasterFile Premier, which was where I expected to find it.
I like being able to use this to research appliances I want to buy since I no longer have a subscription to Consumer Reports.

Ebsco ebooks

I have not ever explored this, so I was excited to see what is available. I was a bit disappointed in the children's and young adult fiction since when you click on that category there are only two books listed. This seems like it's not worth even having the category. Then when I looked at the children's and YA non-fiction I was more disappointed. There aren't  very many books and the copyright dates are more than 10 years old, so I wouldn't recommend them to anybody for research purposes. For instance  Asia and Our Postal System both with a 1999 copyright need to be weeded, not read. Then I tried a couple of different searches, including feminism and flappers. I came up with a book on the abortion debate, agin with a 1998 copyright. I think that if I am going to use this resource with students I'll mostly recommend it for history topics and make sure that students pay attention to copyright dates when using books found here. I do like the way the book displays and is navigated, but I'm not sure how much I'll use this resource.