I work in a conservative environment. Not a big accounting firm, but similar. Office dress code is smart casual/casual, but more formal business wear is required for client meetings etc.
I tried this dress on today and loved it. It fits well, although very fitted over my not tiny bum. I can only justify it if I'm going to be able to wear it for work. Can't decide though whether it's appropriate. I'm mid 40s, if that matters.