Like many who review netbooks, I've always been a big supporter of Samsung's products. They're often a little bit more expensive than the competition, but they have superb build quality. Most of my articles are, in fact, written on a Samsung NC10, which I purchased because of the great keyboard. The NC20 is similar to the NC10 and most other Samsung netbooks in that it has a great keyboard, good screen, and okay trackpad. It also looks like most other Samsung netbooks - in other words, fantastic.
There are a few things about the NC20 that are different, however. One is the use of a processor from VIA rather than Intel. In practice, however, the VIA processor used in the Samsung NC20 has nearly identical performance to an Atom. The Samsung NC20's screen resolution of 1280x800 is average these days, and the battery life of about 5 hours isn't going to set records either.
Even so, the Samsung NC20 nails the fundamentals. It has the best keyboard, period, and an extremely good screen. It also retails for less than $500 bucks, which is one way the NC20 differs from other Samsung netbooks - the NC20 is a really good value.