works good, makes clean looking newsletters .. If you send newsletters sendy is the product for you especially if you already have your bounce system in XF setup for a while. AWS will smack you down if you use a list with alot of hard bounces so make sure your system is clean my personal advise is to send to the users who have visited in the last 6 months AWS is cheap I send out about a 5k newsletter and my bill is around a dollar.
Excellent addon. Works seamlessly and communicates with Sendy immediately. I used to pay over £100 a month with Mailchimp, but now, using this product with Sendy and Amazon SES my monthly bill is just a few dollars.