I used POA signed in Nov 2001 and my solicitor completed for in Feb 2002 for my 1st house in Manilva, we then picked the keys up from the show house. No problems he did NIE, power, water and wills signed when we next saw him. He charged 24 euros for POA and I think it was signed in front of the notary.
For my apartment in DV we came over and signed so we could snag and get furniture in etc., we used same solicitor. We would have used POA again if needed.
If fact with POA he/she has to act in your best interest.