What advice to expats in Porto have about housing?

When we asked people living in Porto about the social scene there, they described it saying...

"Excellent housing is readily available in Porto. If you take the time to really look you can find good affordable housing. It is more cost effective to buy than to rent right now," remarked another expat who made the move to Porto, Portugal.

Other Questions:

What do I need to know before retiring in Porto?
What do I need to know before moving to Porto?
How do I find a place to live in Porto?
What is a typical expat home or apartment like in Porto?
What is the average cost of housing in Porto?
How do I meet people in Porto?
What should I pack when moving to Porto?
Where should I setup a bank account in Porto?
Will I be able to find a job in Porto?
What is life like in Porto?
What do people like (and dislike) about Porto?
What type of social life can someone expect in Porto?
What is the social scene like in Porto?
What advice to expats in Porto have about housing?
What are medical services in Porto like?
Are healthcare and health insurance expensive in Porto?
Is the cost of living in Porto high?
What are the visa & residency requirements in Porto?
Why do people move to Porto?

What advice to expats in Porto have about housing?

If you live in Porto, newcomers to Porto would love to hear your answer to this question: