I'm quite surprised as to the good quality of this microscope for the price. I was expecting a bit less but pleased with what was received. The body is cast, heavy and solid, no toque issues during focus. The stage is also solidly built, if it's plastic it doesn't feel like it, it feels like metal with a powder coating or something. The stage clip could use a bit of work but it holds the slides in place well enough. All adjustments, stage and focus (coarse and fine) are well built and offer smooth movement. The condenser and aperture surprised me on this one, again for the price range I really assumed they would have skimped on the quality here but they actually pulled through and included some decent hardware that offers good lighting distribution and contrast adjustments. The LED itself, however, could use some work as the brightness levels aren't the best. Obviously it can dim down to off, but it doesn't seem to want to get bright enough when the aperture is closed all the way for higher contrast, it could use a bit more brightness, especially if using the 100/1.25 objective lens.
The video in this review shows the blood sample provided with the microscope at 3 stages, recorded with my phone with the included phone mount atop the 2x & 25x lenses. The 1st part is 4/0.1 (200x), 2nd part is with 10/0.25 (500x), and 3rd / final part is with the 40/0.65 (2,000x).
The phone mount is cheap plastic and wobbles around on the eyepiece, but locks to the phone quite well and offers adequate adjustments for your phone camera lens placement.
Power supply is via a USB plug but the microscope itself doesn't have a USB plug (see picture of plug type). Power output of provided adapter states it's 1,000mA, so 1 amp, so keep that in mind in case you plan on using this with a USB power bank. Possible as long as it can output enough current.
No broken or missing parts and overall very pleased. This will provide an amazing learning experience for the kids, with adult supervision and guidance. Highly recommend for any young aspiring scientists out there.