It's super easy to use. Absolutely stunning templates. The price is right. You get unlimited subscribers and the price doesn't increase like with most email marketing platforms. Review collected by and hosted on G2.com.
It just came out of beta (was in beta for a LONG time). It can be glitchy sometimes. The support isn't the best I've seen with taking too long to respond or giving canned responses.
It's not as intuitive or robust as platforms like Active Campaign and doesn't have all the measuring and analytics I would really like to have.
Also, it can be difficult sometimes to upload your list(s) because they have a verification process to go through. Review collected by and hosted on G2.com.