I've had about 3 months. I needed a laptop, both for his work on my home than to be able to carry through improvisation sessions with my buddies. I use a Motu 828 mk2.

J'apprcie lot design (simple and good taste), finish (it is fortunately far from the cheapness of plastoc SERIES FR), the quality of the screen (and colors DEFINITIONS beautiful) ...

Ngatifs at points, I would say the noise of the fan, when used rclamant lot of CPU resources.
The weight (it is a bit heavy the guy, but hey another ct ca srieux is ...).
The weakness of the hard charging battery (45 minutes max large in use supported computer music).
This is because the processor is a Pentium 4 2.8 ghz true and not a Pentium M, optimized for mobile use ...
The lack of USB 2.0 connection. There are only 3 ports, this may seem a lot but soon we find ourselves in need (midi keyboard, mouse, control surfaces, MIDI etc. ..)
Personally, I chose not to take a Pentium M-based config knowingly. In order to have maximum power even if operated only on area and use the battery when I'm on applications lgre more ..
If c'tait again, I would do the same choice. I have no problem of stability and some incompatibilitspriphriques that may be encountered on other laptop, Vaio n'on course not.
Evidence for many producers pro (Kraftwerk Mark Bell through Matthew Dear), which we choose to take a Sony ...

Ok then, it is more expensive than the competition (on average 200 euros more MODEL equivalent), but it may be worth if you make heavy use.