We really like using HubSpot's message templates, especially because of the feature that allows you to insert personalisation tokens, which are then automatically filled in the email.
Unfortunately, there is one essential feature that is available when saving Outlook templates but is still missing from HubSpot's message templates: it would be nice if you could store fixed recipient email addresses for specific message templates.
Specifically, from our point of view: we work with partners whose products we resell. When one of our customers orders a partner product, we have to send an email to our partner specifying which customer ordered which product with which key data. The partner requires us to always send this information to specific email addresses. And it would of course be easier for us if these email addresses were always stored with the message templates.