Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
I bought the one with a 20 GB hard drive, and I have since put an extra 256 MB memory in it. This machine is wonderful because it is so light, and yet it is powerful enough to run OS X, and just about any software you want to throw at it. It is dynamite on airport networks. I move mine between home and work i.e. between two airport networks, and that is really easy and convenient. The screen is just the right size for a portable, and really easy to read, and clear as crystal. If you want speed, go for the higher CPU speeds and the higher bus speed, but I have been very happy with the 66 MHz bus and 500 MHz processor. It is fine for everyday work. If you really want to move fast, use your desktop. I use a dual processor G4 with two screens when I really need to move fast during the day. However, my ibook is always on, in use for my calendar and for backups, resting by the side of my desktop screens. I would not be without it. At home it is my main machine, where I do all my work stuff. What amazes me is how many applications I can keep open and in use for hours under OS X. No crashes, lots of flexibililty to keep many things going at once. Absolute magic! The really neat thing is when you meet a PC maven, or even a G4 Powerbook, the other machines are so BIG! This ibook is wonderful on the road. I have carried my ibook around in a ordinary bag, not a padded computer bag, for a week at at time, bumping about, with no ill effects, either on the computer or on my shoulder!
I add this comment over a year later.  I stand by what I said above, except that the hinge on the screen is giving me trouble now.  The computer needs to warm up for a while before I can put the screen in its fully opened position. Eventually, I am going to have it fixed.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: A: very positive