I'm probably barely scratching the surface of what I can do with it, but as a code editor it works well and it's the first time I've ever actually found code completion that seems to work well with the way I think. There aren't any formatters for a couple of the languages I use on a daily basis but that's a Me Problem - the overlap between IDE users of any sort and assembly programmers is probably quite small.

Are there any MS-branded features I should care about positively or negatively?