I really like their customer support; they are very responsive and professional in all of my communications with them. The features available within this product suite work well together as one big package! There's not much about it that isn't great (except maybe customization). We've used other products from MailChimp before so we weren't totally unfamiliar w/them. That being said though - once you use these tools everything becomes seamless when building our campaigns / senders or integrating into any third party apps which can be integrated directly through your account page using Zapier. I like how easy it is to set up campaigns and track results. The interface could be more user friendly, but I think this is due to my lack of experience with this platform. We are using this product to send out emails to our subscribers about new products we have released. This has been very helpful in keeping our customers informed.