I've just started using sass/compass for a project and I can tell I am more productive than ever, though I am using 960.gs instead of blueprint with compass. I am using compass for sass/960 and staticmatic for haml - so I can output a set of html/css files which are used in my php project.
I am loving it, especially since staticmatic has preview mode and compass has --watch mode - so I have both running and auto updating my preview while I work on it. Even if I didn't use haml at all and no framework (960), it would still make sense for sass variables and mixins with input variables alone.
building sites that work across browsers is easier with reset+some framework, but I still have to have IE7+ specific css, and compass seems a bit moody on windows.
edit:
I am not sure if I would be comfortable using anything external to css to output css that has the same syntax, like less seems to have - it would most likely pollute my way of thinking down the road.
I am loving it, especially since staticmatic has preview mode and compass has --watch mode - so I have both running and auto updating my preview while I work on it. Even if I didn't use haml at all and no framework (960), it would still make sense for sass variables and mixins with input variables alone.
building sites that work across browsers is easier with reset+some framework, but I still have to have IE7+ specific css, and compass seems a bit moody on windows.
edit: I am not sure if I would be comfortable using anything external to css to output css that has the same syntax, like less seems to have - it would most likely pollute my way of thinking down the road.