Is there anyone who has used one of these who can comment on the amount of lag? The website makes a lot of claims about almost everything except lag. High acc

Is there anyone who has used one of these who can comment on the amount of lag? The website makes a lot of claims about almost everything except lag. High accuracy (claimed) is nice and all, but it really throws you off if you're drawing a curve and what's showing up on the screen is precisely half a second behind your hand! Low latency is crucial for a stylus. Absolutely crucial. It's what separates tools from toys.