So having come from trying another email marketing tool lifetime deal (no names), which despite a pleasing interface, I found to be underdeveloped and underwhelming, I decided to try Tarvent with modest expectations.

And I have to say I have been blown away! Let me list a few of the things that I really rate about this software:
1) Quick delivery of emails - sounds like a no brainer but the other platform had delays of up to 12 hours.
2) Very smart and intuitive campaign builder
3) Logical contact infrastructure, and powerful search/sort tools
4) Automation - this is top drawer. I came from GetResponse, and this is up there and even better in some areas. Massively flexible, but with a simple interface
5) Dynamic content - Wow, I was not expecting this! The ability to personalise your email not just with a name, but with a whole content block - super powerful!

Lots of other pleasing features and touches, questions answered quickly, detailed help files and tutorials, I haven't even looked at Landing Pages and Surveys yet - overall a feeling of being well thought out and well cared for, with a responsive team

Stongly recommend you take advantage of this deal, it's a stonker!