I bought the MiniBrite 5x (PO-55) for reading values on small electronics parts, calibrating an old slide rule, and a number of other tasks that require a bit of magnification. It's not perfect, but I find the MiniBright 5x to be quite decent. I'm only giving a 4-star rating because this magnifier is not perfect, but it is quite good for the price.First, you can't expect such a magnifier to be incredible for $10. I'll explain in more detail. Also, refer to the attached photos (tax form fine print, slide rule, and capacitors) to get an idea of what it's like. Note that these photos may not be as clear as I could have made them, nor do they provide a totally accurate representation of what to expect, but they'll give you a relative idea of how well the magnifier and light work.Is the light amazing? It could be better, but it is decent and usable in lower light. It's certainly not going to light up a large area like a page in a book, but it will light up something small that needs magnification, and that meets my needs just fine.Could the battery door be more sturdy? Yes, but again, it's compact and very inexpensive. Low cost and inexpensive construction go hand in hand. Just be careful with the battery cover, and it will be fine. If you want a more sturdy magnifier, be prepared to pay much more. I've had many expensive TVs, DVD players, etc that had remotes with battery covers that did not stand the test of time. For that price, those remotes should have been bullet proof. This little, inexpensive magnifier has a somewhat fragile battery cover that could be improved. Just be careful with it. Annoying as it might be, if the little tabs on the inside of the battery cover break off, throw a piece of scotch tape on it, and call it a day. It's still a decent magnifier for the price. The thing is only 10 bucks!The 5x magnification seems to be reasonable and is pretty good. I'm happy with it. I have a 30x jeweler's loop, and there's NO WAY it's 30x! I've also read many reviews on other magnifiers, and many of those manufacturers over magnify their magnifier's magnification level (excuse the pun). I don't know how magnification levels are rated, but I'm reasonably happy with the 5x rating on this MiniBrite 5x.The lens is acrylic (ie, plastic), but the clarity is quite good and makes it appear to be glass. Take care of it, and keep it covered when not in use, and the lens should last just fine. Again, you can't expect too much for 10 bucks!For those of you looking for a magnifier to keep in your pocket to read menus and such, the MiniBrite 5x magnifier might not be for you. For menus that are very wordy, it might be slow going to read everything. For more concise menus, it might be fine. Don't get me wrong, it will magnify the words on a menu just fine, but it won't allow you to see much text at any one moment. You could have a wider viewing angle if you place the MiniBrite 5x about 1-2 inches from your eye and equally close to the page, but who wants to look like Sherlock Holmes examining blood spots in a restaurant? You might be better off with the MiniBrite 3x, which should provide a wider viewing angle (how much better? I don't know) but with a little less magnification. Remember, regardless of the manufacturer or quality of the optics, more magnification always means a smaller viewing angle, so it's a tradeoff. This is exactly why you must have your eyes so close to the eye pieces of binoculars--for the largest viewing angle.Lastly, I absolutely love the sliding cover! There's nothing worse than a dusty, scratched magnifier, so having this cover was the selling feature for me. Placing a magnifier in a sleeve or pouch when not in use would be fine, but having a sliding cover rocks! It's so convenient to have that cover.After buying the MiniBrite 5x, I noticed the LumiPop 5x (LP-66), which I kind of like better because of its cleaner design and separate light switch. The lens is probably identical. I suspect it's the newer design to eventually replace the MiniBrite 5x. I still like the MiniBrite 5x and will probably move it from my electronics work bench to the kitchen, and then buy the LumiPop 5x for use at my electronics bench to see if it's as good as it looks. Aside from the cleaner design and separate light switch, both MiniBrites are essentially the same, and I'd be content with either.Reading all of the reviews on similar magnifiers drove me batty. I hope this review helps your search.