lucy24 - 1:50 pm on Jan 26, 2013 (gmt 0)
I use them daily, they work great
How do you know? Have you checked them repeatedly against languages you know well? That goes double for non-Indo-European languages where they can't simply go word-for-word. Look only at Google In Your Language to see the level of cluelessness they're working with.
I'm prepared to take g###'s word for it that such-and-such Russian word means "rat", because it fits what I find in logs. But in general I wouldn't trust a machine translation unless I had some independent evidence that they're reliable.