Well I actually have one, and for cutting lexan, it is quite superb. It is slower than a circular saw, but is easier to handle. If you use it carefully enough, you actually have a chance of cutting acrylic without it shattering or cracking.
Works well for wood too. It is like a power hacksaw and is relatively safe. I’ve only found the HSS segmented saw blade useful though.
Have not tried to sand anything down with it yet, but for painting cases, you should always to that by hand anyways.
That’s an odd looking tool. But if it works well for you, awesome! Honestly, a stick could easily be built using nothing but hand tools. The tools you know the best will give you the best results so rock on if this is your choice.