I’m planning to move a large set of VCF contacts to Outlook and want to choose the best tool. What key features should I look for before purchasing a VCF to PST Converter? Should it support batch import for VCF to Outlook, keep all contact details intact, and work offline without errors? Is there any difference in performance between free and paid versions? Also, does it matter if it supports all vCard versions like 2.1, 3.0, and 4.0?