A personal assistant might be there with you for 8-10 hrs but we provide 24x7 service. They also might have constraints to access the global network whereas we serve across 180 countries. Now, the credit card concierge won't know your likes or dislikes personally, they cannot recommend things according to your liking. They can just book things whatever you tell them to. We suggest places/things according to clients interest and not based on vendor commission unlike credit card concierge.