I think about a year now. I would like even lighter switches than Pro Red but they're much better than the default Kinesis ones that make my hands hurt. I find personally the lighter switches are more important than avoiding bottoming out, but that is controversial. It took me a couple weeks to regain my typing speed, not a huge learning curve like it was switching to KA in the first place. The travel case is also useful but quite large. It's more fragile feeling than Kinesis products, but not as bad as many 3d-printed DIY keyboards. The fragile feeling comes from its lightness which is also an asset.