CAUTION: I think I know what happened to the 1- and 2-star reviewers. If you click on the "Departments" section at the top of the issue and read a bunch of stuff, it totally looks like a useless skeleton of a magazine. "Departments" is not a divided summary of the entire issue, it is their label for some very brief commentary and book plugs by the magazine's various staff members. Worse yet, each "department" subsection is labeled an "article" which is not so helpful. The haters here are not nuts, they just forgot to back out to the main outline. This section is probably about 5% of each issue.
On to the actual Kindle edition of the magazine: very good. The articles are re-sizable plain text with inline images (which you can zoom in on by pressing and holding, then tapping the zoom popup and doing a pinch), which is exactly how it should be. I no longer have the print edition to compare, but it looks like about the right number of full articles to be an entire issue (unlike some phone versions of magazines which are hacked down a lot).
Science News itself is a good magazine to read for news from the world of science. In general, the articles are reasonable summaries of whatever scientific paper they are based on. Of course nothing is perfect, but Science News is not written by complete idiots like those who write science-related articles for major news outlets. Science News also does not publish just any trash which is cranked out under a "science" label, which seems to happen with Science Daily (essentially a press release service in many cases) and New Scientist (the shock jocks of science). The articles are actually written by the magazine's own staff, and they appear to be competent writers.
The only thing which Science News lacks is the latest news on evil anti-science activities like creationists, fake medicine, etc. This is not a magazine for routine tracking of quacks and frauds, but you can find plenty of that elsewhere. This is a magazine for educating yourself.