Very nice, and getting more full featured by the minute, giving
The Gimp a run for it's money. However I found it to run slow; anybody else notice? I see this quite a lot with many of the apps ported from *nix to Windows especially when they rely extensively on external libraries for functionality (Inkscape needs gtk+, perl, ghostscript and some other little things that it warned me I didn't have when I first tried it.) Viable alternatives are
The Gimp,
Sodipodi (renders to svg and png only...) and
EVE. If you already have
OpenOffice, then Draw is a quite capable vector/raster image editor.