I know that Wayne from the old board and the "other" board likes it on some tracing operations
I've used it with...well I'll just call it "limited" success. I gave Inkscape so many chances but the big issue with it is that it will take any other programs files and completely botch the import/export. Makes it almost unusable for any real work. The interface is nice though and some of the tools are useful.
The frequent crashes - not so nice.
The open clip art repository is pretty cool though.