Pay attention to the "Maximum test voltage" - 40V with X1 probes
For that price, how good do you expect it to be? It certainly isn't a Rigol, Siglent or any of the other name brands but it very well could be 'good enough'.
What do you plan to do with it? For audio, it is clearly good enough, for FPGA work the bandwidth is too low but that's the case for almost all entry level (<= 500 MHz) scopes.
It is certainly better than no scope and could fill in the gap until funds are available for a much more capable scope.
ETA: I watched Dave's video and this thing is really a 20 MHz scope. So what? That is fast enough for all Arduino projects and likely all RPi projects. There's an unrealistic idea that we NEED 100+ MHz. I got by with a 10 MHz Heathkit all through the early 8085, Z80 years including building my own floppy controller based on the Western Digital FD1771 controller chip. At most, those were 6 MHz signals and I somehow managed to get things to work.
I could certainly see hanging one of these on my analog computer. The signals swing between +-10V and only at about 10 Hz I could permanently mount it and leave my bench scope alone. Dave didn't demonstrate X-Y mode and that is sometimes necessary. The scope has that mode.
There are a lot of applications for this kind of tool.