Guide to Spanish for Portuguese speakers

Here’s something a bit unusual. Elsewhere on Hacking Portuguese I’ve pointed readers to resources for Spanish speakers wanting to learn Portuguese, but for those strange folks going in the opposite direction (like me), I recently stumbled across Guia do espanhol para quem só fala portunhol, a 100+ page pdf. It moves fairly briskly through the points of difference between the two languages in terms of pronunciation, spelling, grammar and usage, and seems like an excellent introduction to Spanish for those who already speak Portuguese well.