We used Sendgrid to send out a daily newsletter and it was very easy to integrate. The support was top notch and we were able to get what we needed help with in a very short time. We had one issue that we had to wait about a day for them to respond to. We would definitely use them again. We are sending out our newsletter daily and it was very easy to set up. The best thing about this service is that you can track all of your messages as well! There isn't much I dislike here but maybe there could be more options for better tracking? But overall everything works great so far!! This has been very helpful because we have had issues sending out mass eblasts before now. Great product if used correctly. ! Definitely use them they do help alot when trying tto get our message across. . !!