I was shocked how much more comfortable a ortholinear matrix layout is for typing. It looks like it's a big change and you need to adjust for a long time, but I got used to it within a day and even fixed some poor habits. And while we're talking about matrix layouts: the space bar doesn't every need to be that big and is such a huge waste of space, it makes me mad. I started using a grid layout and thought it might feel weird and I'd have to set multiple keys to space, but I only ever use the size of one letter key for space. Now I have about 5 more keys to use for other things (space bars are traditionally around 6 key units long). If you want to look at what I'm typing on, it's the Planck keyboard on ortholinearkeyboards. I bought it as a side project while waiting for another keyboard, but love it more than any other right now :)