Small repairs and adjustments away from a toolbox: tightening a screw, gripping something that will not turn, stripping a wire, opening a bottle, trimming a thread. It is a compromise device by design, and its value is that it is in your pocket when a proper tool is in a drawer at home.
Small jobs, done adequately. A multi-tool driver will turn a loose screw; it will not build furniture. Its pliers will grip a stubborn fitting; they will not replace a full-size pair for sustained work.
Judged as a compromise it is excellent. Judged as a toolbox it disappoints, which is where most complaints come from.
Count what you actually use rather than what is included. A tool with twenty implements you never touch is heavier and more awkward than one with the six you do.
Pliers quality and one-handed opening matter more day to day than implement count. See our multi-tools category.
Any multi-tool containing a knife blade is prohibited in carry-on baggage under TSA guidance, at any blade length. Blade-free models exist specifically for this.