First of all, I want to say two points. The first point is not to buy on impulse. I bought two sets
directly and spent $400, because I think the effect is very worth it. I bought nearly $100000 props
in 10 years (it's no exaggeration). This is a very few that make me feel really unworthy Because the
price is too inconsistent with the actual product. The second point is that it can't work perfectly,
and sometimes it has something to do with people's writing strength. 400 dollars, It's sad,