It's workable, but it's not yet a full NLE that might compete with other retail NLEs for the home user market. There's no real documentation, and so for example no way to know what the Advanced Edit button on the timeline toolbar does -- it's just grayed out. Import speed and handling for large files seems good -- it didn't pause at all with a 30GB file over a network connection to a VM. It's also a 32-bit app in an age where most all NLEs have moved to 64-bit maybe a decade ago, so that *might* be a plus if you're stuck on 32-bit Windows.
TunesKit AceMovi 2.1.0 does follow the general layout of many other NLEs, but the same functionality isn't there. The video preview window is front and center, but it's not the center of the universe for editing, and that where most video editors do most of their work -- not on the timeline. It does come with a basic media library, but it looks like parts have to be downloaded if/when you want to use them. Missing is any way to move around the frame, say to pan a still image, but more important, there are no audio tools to blend one clip into another. It relies just on ffmpeg, which is cool as long as you're not trying to export mpg2, e.g. for DVD or Blu-ray.
DaVinci Resolve has their free version, which while at or close to best in class, is going to take some getting used to if all you're familiar with is the traditional work layout in most consumer NLEs. Lots of people seem to prefer the free Shotcut -- there's a new version just out with lots of fixes BTW -- which has come a LONG way since it first appeared on the scene [that was back in 2004 -- Gosh I feel old again]. And I still feel it's hard to go wrong paying $1 for Pinnacle Studio 24 Ultimate over at Humble Bundle.
TunesKit AceMovi 2.1.0 adds the program's folder, empty folders in ProgramData and in My Documents, and a folder in C:\Users\ [UserName]\ AppData\ Local. The registry gets a few new keys for Windows context menu, an uninstall key, and a key for the app itself. In fact, the only unusual thing I saw was that the registration data is stored in the registry using Chinese characters -- shouldn't effect anything, that's just the first time I've seen that.