TL;DR; Overall, good and generous deal, with some negatives that took off one taco, which I hope to get fixed. I purchased Tier 1, and will probably upgrade regardless of my rating.

Kirim Email provides decent email marketing platform, with neat features such as:
* Email validation and Zombie Email Removal (my favorite)
* Autoresponders
* Broadcasts
* Lists, tags, and segments
* Email automation feature (see bellow)
* Hosted landing pages
* Built in responsive email builder
* Integration with Wordpress, WooCommerce, Zapier, Pabbly Connect, Webhook and API support, and many others
* Nice and responsive customer service
* Basic viral contests feature
* VERY generous email credit (top leverage)
* Emails support RTL (Arabic, Urdu, ...)
* Transactional emails support

But it's not perfect. There are some drawbacks which I hope the team fixes
* Email automation is pretty basic. You cannot create sophisticated workflows as in Encharge, or even INBOX. It misses a lot of detailed triggers, actions, and filters
* Email builder is functional, but its UX is terrible! It's a third party editor called Unlayer (also used by Encharge and INBOX)
* I'm not sure if this is their problem, I over and over to upgrade my registration tier, but I keep getting an error!
* The Account review process takes relatively long (they say ~1 day), through which I was supposed to be able to use many features, but I couldn't even navigate the dashboard. I guess it's a bug

Bottom line, It's a great deal, I'm putting high hopes on the great team behind it to fix it's disadvantages. If you're into internet marketing then you really shouldn't miss it, specially if you have larger list(s) or an agency