A comparison with Vista I can not draw, unfortunately, but to Windows XP x86 SP3. Caveat: Despite the euphoria should leave the church in the village anyway - Windows 7 will not work miracles.
System: Motherboard | Gigabyte GA-EP43-DS3L, CPU | Intel Q6600, RAM | 2x 2GB OCZ Titanium XTC OCZ2T800C, GPU | ATI Radeon HD 4670, HDD | 4x Maxtor STM3 (500GB) SATA 418A
[Addendum: The installation went smoothly and largely automatically. In the event that you want to set up a boot partition, you should allow at least 20GB space. The time required to claim a maximum of one hour - plus a few minutes for user data, according to which the operating system is ready to use.. After setting up the network immediately the latest updates, we recommend to install - this is also a tool for selecting the browser is integrated]!
[W-7 ~ 25 sec: even after a long period of use if proper precautions will change, because nothing - With Windows 7, the PC startup time is significantly reduced (boot partition uA regularly of temp objects free, defragment, etc..). 32 services and 4 processes in the Startup] -> sec to [W-XP ~ 55. with 21 services and processes in 4 As]. Also working with Windows 7 is much faster, but not equal simple. The switch is not complicated, but requires possibly giving up imports or other habit. For example, the visual structure of the Explorer has been redesigned: links a directory tree is always made available, which are adapted with new options and can facilitate the maneuver. In the Open dialog (eg Editor-> File-> Open) has integrated this structure MS. The "Before & Back" buttons are still available, but there is no "up" button, which was replaced by an implemented in the path / title bar selection system. Here you can go with a mouse click immediately in a befindliches on the path directory back. Interface improvements, such as the Aero theme, offer new possibilities of visual design, which are however, a large area reserved for x64 users.
Playing under Windows 7, I can at this point only inadequately assess and refer rather to other reviews!
Some reprehensible points were still the background activities (usually associated with strong disk activity), as notified as the evaluation of user behavior, to make improvements to the operating system itself, and this Microsoft, or the Defragmntierungswerkzeug what the system "optimized during periods of inactivity and corresponding thereto power saving settings ". However, these and other processes can be set individually under Control Panel / Administrative Tools / Task Scheduler. The UAC is of optimization. In my case though is the good old command line interpreter for use (here's a plus point in terms of the mass of batch commands (where 92% can also be found under 2000 / XP)), but if you switch from XP to should first literary with the theme "user rights, network / shared folders, etc." deal (recommended but not required!).
With regard to the stability, so I had at this 3/4 Test year with the Ultimate release candidate, up to one month with the Prof. OEM version no problems in the form of crashes, "Freezes" or similar .. If I'm honest, I miss even the one- or other bluescreen (... maybe I should not say that too loud ...).
On the whole, the new operating system Windows 7 is a project, which contains many new features and improvements. Many of the criticisms that are still hold against lawful because the limited functionality of many devices and drivers keeps coming up - therefore only 4 stars (and 'n Thump-up). However, one should also read between the lines; It is often banal LAYER-8 issues, so handling errors, which lead to cynical reviews and worsen the complete image without permission. Windows 7 is directed not at all only to IT adventurer or experienced users, but also can the laity prepare with great pleasure. Nevertheless, a little patience and a willingness to face the new challenges, this is the best setting!