More pro: Spain may be one of the best places in Europe to raise kids (culturally, especially), though a good chunk of the country has emptied out of its young people - so it can vary by region. It's a shame that their birth rate has gotten so low. Crime overall is very low, especially if you're not tied directly to it.

More cons: You will eventually have to shift to a very different customer service climate and hours. The development levels can vary quite a bit, especially "modern" infrastructure like internet outside of the major cities (maybe that's gotten better in the last 5 years). Bureaucracy of some institutions (government/finance) can be extremely frustrating.

Regarding internet infrastructure, the fiber optic network seems to be quite robust these days. There are still places where it isn't available, but compared to e.g. the US it's another world entirely. Even small cities typically offer 1 or sometimes 10 Gbps hookups in many areas.

Regarding bureaucracy I'm afraid that there has been no such progress. Extremely frustrating that even when I do everything right, I get told to come back another day for my trámite because they just...haven't done it! Sorry!