No complaints at this end either - I've been running Vista since RTM (Nov 8th, 2006). Other than being frustrated by device driver and application support, Vista has been very stable.
A *lot* of press regarding "Windows 7" is seem to be short on facts:
1) Vista is based on the Windows Server 2003 codebase. MS made a pretty painfull decision to bypass the XP codebase (at the time SP1) and restart all development efforts based on the soon to be released Server 2003 kernel. This has been called by some, the "Longhorn Reset" - it added at least 18 months to the effort. During this period XP-64 was released (XP SP2): minimal application and hardware support, based on the older XP driver model.
2) Vista at SP1 is "aligned" at the kernel level with Windows Server 2008. I'm running Vista 64 on my home and work desktops, my laptop is running Server 2008 (32-bit). All applications run fine, CS4, LR2 . . .
3) Windows "7" will actually be an incremental release of Vista (and Server 2008) - the kernel will have a major version of "6", meaning driver and software compatibility with Vista. Most of the important changes are under the hood; consolidation, continuing to eliminate internal dependencies between major subsystems . . .
4) DRM or Digital Rights Management is left to 3rd parties to actually implement. In the Windows world, this began as early Media Player 9 running under Windows 2000/XP. Vista expanded the concept to the O/S API level for good reason - DRM serves more than one purpose, media content is only one possible DRM implemtation. Trusted or signed code at the device driver level would be another . . .