Excellent find
With the free alternatives, often useful as they are, I think you get what you pay for. As a language professor I find myself gratified to have this in depth resource with me, even off line. I imagine the casual learner doesnt need this. But I know no superior resource for those who want to read and speak and build in depth knowledge of both languages. Buy it if your goal is to speak well!
ScubaDyer about
Collins Spanish Dictionary