If you're looking for a reliable EML to PST Converter, I'd also recommend trying the BitRecover EML Converter Wizard. It supports bulk conversion of EML files from Windows Live Mail, Thunderbird, Outlook Express, eM Client, Apple Mail, and other EML-supported clients directly to Outlook PST while preserving attachments, folder hierarchy, email headers, and metadata.
What made me choose it over others was that it can create Unicode PST files without requiring Outlook, merge multiple EML folders into a single PST or create separate PSTs, and even export directly to an existing Outlook profile if needed. It also supports advanced file naming, selective conversion using date filters, and handles very large EML collections without changing the original email content. A free trial is available, so you can verify the output before purchasing.