The new plastic unibody MacBook is arguably the second-best MacBook model Apple has produced yet (trumped only by the late 2008 aluminum unibody MacBook). So why am I finding myself unexpectedly underwhelmed and disappointed with it?

When rumors began circulating in late summer about an imminent new unibody MacBook in polycarbonate plastic. Being a consummate Apple laptop aficionado, I was excited. Speculation that it would sell in the $700 – $800 range further whetted my anticipation but I was also expecting something insanely great. After all, Apple could build on what it had learned making polycarbonate MacBooks for three and half years (the best-selling Mac model ever) combined with the unibody engineering of the MacBook Pros adapted to plastic materials.

However, instead of insanely great, we get OK — or perhaps just a bit more than OK. I like it a lot better than the original MacBook, but there’s nothing really exciting or special to get up in the night and write home about. It’s just a good, solid-performing machine w