Real law firm? Panama Offshore Legal? in Panamá City?

I'm considering doing business with a law firm claiming to have

30 employees and is located at Calle 41 Este, IPASA Building, 3rd floor, Panamá City.  Can anyone living near by maybe confirm its existence and check if it is real? I would greatly appreciate it, if someone could pop their head in if you are in the neighbourhood.
Thanks in advance, greetings from Spain.

They are very real, quite popular and overly expensive

Yes it is a real firm and they are pretty good from what I hear. I have not done business with them my self.