If you're here for the TL;DR version, forget about the Movo UM300 and get the Movo UM700 (
reviewed here). The Movo UM700 performs significantly better, has more features, and only costs $20 more, which is completely acceptable considering what you're getting for your money. Sure, the more compact form factor of the UM300 is an obvious benefit for users who need a USB microphone they need to lug around in their backpack, but if you're willing to take the UM300 with you, surely you won't mind carrying the only marginally larger UM700 with you instead. With that in mind, the only advantage the UM300 has over its slightly more expensive sibling is the USB-C connectivity. The UM700 is equipped with an ancient Micro-USB port, which is becoming a major nuisance in 2021.
This opinion of mine derives directly from the previous page of this review, where you can listen to a direct comparison of the sound samples recorded with the UM300 and UM700. In them, you can hear that the UM300 sounds thinner and slightly more sibilant in cardioid mode. Its omnidirectional mode is forgettable, and that's putting it mildly. In this mode, the built-in 14-millimeter capsule takes a sharp turn for the worse, so much so that I can't recommend it for any kind of voice or music instrument recording. Another drawback of the Movo UM300 is its multipurpose volume knob. Because you have to use a single knob to control the microphone capsule gain and headphone output volume, the knob just spins endlessly in both directions, leaving you guessing at what volume you've adjusted either of these two parameters to.
While the UM300 also has several clear strengths, such as its great build quality, lag-free microphone monitoring, and seamless connectivity to Windows or macOS computers, Android phones, and other USB-C recorders, it's still a no from me. I can't find a single reason why you shouldn't spend $20 more on the significantly better Movo UM700.