Correction: the 5500U is not a rebadged version of the 4500U that does not have hyperthreading , but of the 4600U that does.
In the past, you'd press the Fn key first to use these features: now, the function keys operate the advanced features by default.
With no distracting bezel, you'll feel more immersed in your tasks.
Let me know what you think about it in the comments section below.
No way I want a replacement or repair after this.
The audio quality is also about the average you should expect from this class, fine for movies and music, but not impressive by any means.