I recently decided to upgrade my Tier to support Mysignature.
Their development has been steady and the templates are very nice and well done.
The support is good and promptly replies.
The deal terms are generous to potentially add a side business based on it, that's not bad at all.
I'd like to have more custom domains included, but overall it's okay.
The fact that they basically doubled the signatures and added the biolink pages (even if still raw) it's a sign that they care for Sumo-lings.
You can still achieve the signatures via free tools, but recently some changed and are not charging, so why not spending a bit on this deal and just use in less than 5 minutes to generate very catchy and professional email?