Like most here, I think that "good" depends on your perspective. If you're a newb, you'll probably find lots in MR and RMC that will be new and useful to you.
OTOH, if you're like me, and you bought (and still have) your first MR from April 1971, and subscribed for years, you'll see that there haven't been many "new" articles in the last decade or so. There's been some advances in technology (DCC) and range and detail of models (thank you, China), and more focus on prototypical modelling, but you begin to notice there's an annual cycle to the articles.
How many articles on "How to weather your whatzit" do you really need? How many glowing product reviews that never point out flaws or shortcomings do you really need? In the last 5 years, the amount of information available on the web has really made the magazines' job difficult, and I don't think they're rising to the challenge particularly well.
I used to get GMR regularly, since the layout articles were about all I found interesting in MR and RMC anymore, but even then, I'm feeling it should be re-named "Some great, some not-so-great model railroads".
But then some people feel I'm becoming a bitter, jaded curmudgeon, so take that for what it's worth.
