The latency has been much improved between rM1 and rM2, apparently. I have only the latter, and I can say the latency is not at all noticeable. My only complaint is with the accuracy of the digitiser: My strokes tend to end up a fraction of a millimeter higher up on the page than where I intend them to go. This is very rarely a problem for me, but can be a source of irritation when I make minor corrections. I have no idea if this is universal or specific to my device, but I intend to find out.

It is barely to not at all noticeable. They also have a matte surface that makes the pen feel and sound like it's actually scratching on paper.

When i first got my rm2, i was looking for that latency, but noticed little. After ten min i forgot all about it