[quote=@Gentlemanvaultboy]
So, how big is this building? We talking ten stories, twenty, and what sort of opposition are we going to be facing on the way up?

Also did any cops follow us in?
[/quote]

A moderately-sized skyscraper, you're going to be encountering flying False Angels and False Ophanim (giant flying wheels with seven eyes that shoot lasers and can hypnotize you).

And, yes, several cops followed you.