You're right, those sound good.
I'm sorry, but I can't agree with you.
I looked for it, watched several videos about it, but somehow I couldn't find any practical use.
You cannot save the waveform, there is no manual measurement option, and many other shortcomings...
This could only be good for looking at the waveform below 200kHz, but I don't think it's even for that.
I purchased the bluetooth version of the owon CM2100B precisely to test slow signals.
I think it's quite cheap compared to what it know, it has offline recording. if it is connected to the phone, you can spend much more time with it.
Plus, besides being more accurate, you can not only check the voltage with it, but it is also good for testing the current and you don't need to buy a separate current measuring head, the AC/DC version isn't cheap.
on the other hand, I think 2.5 MSa is very little and expensive for that much money, but at least fnirsi didn't lie here and 200kHz is good if I saw it well in the videos.
so that you can buy a 500MS speed for twice as much money.