I like that it is a free service. It is very easy to use and I have not had any issues. It has helped us with our email deliverability. We have seen a significant increase in open rates and click through rates. I am able to see the reports and see what is working and not working. I have seen a significant increase in deliverability. It has helped us a lot and I highly recommend it. I have not had any complaints. I would recommend this to any company. I am able to see what is working and what is not. I can see what emails are being opened and what is not being opened.