Keyboard: I have small fingers, and I actually type faster on the netbook keyboard. The key distances are smaller, so I'm moving my fingers les.
Screen: I use a small font (Code Envy R at 10pt) and WMII, so I can fit a lot of code on the screen at once. I can also switch between windows extremely quickly, so it is relatively painless not to have all the code I'm working on, on screen at once.
Battery: I got the six cell battery, because I don't mind the extra weight (unless you have muscular dystrophy what difference does weight really make? It isn't like I have to hold this thing in the air while typing on it. ;) but I do love the seven and a half hour battery life. It also uses close to no power when on suspend (loses maybe 3% over two hours) so I just shut the lid whenever I'm not using it, and a charge lasts me the whole day.
Durability: I've dropped this thing off tables maybe seven times now. It doesn't care. It also spends most of its time in the small compartment of my backpack where it gets jostled all day.