I like that it's easy to use, has great templates for newsletters & email campaigns with lots of options! The UI is also very user friendly - you don't need any training or assistance from their support team as they are super helpful when needed (which isn’t often!). It can be difficult at times if your sending out an automated newsletter without having anyone check over every step in order make sure things look good but this doesn't happen too much which makes me happy :) Great service overall so far- we've used them since day one because our previous provider was such rubbish!! We're getting more sales/conversions than ever before thanks mainly due do using creative mailings regularly through each month via auto emails etc.