The customer service is outstanding, they are really helpful! I can't think about anything that i dislike so far as it's been great working together for all these years now!! Nothing at this time. If you're looking to send bulk messages then there isn´t much competition out their anymore because most people will recommend them when we ask around what email provider would be best suited if our clients want us to manage theirs mail campaigns etc. We have used other companies before but never got any recommendations from friends or colleagues who had previously worked/used services such as MailChimp which was very similar (but didn’t do quite enough). A lot more affordable than some competitors too - especially considering how many emails each campaign sends every month. There aren't too many options available nowadays within the UK market regarding Bulk Email Service Providers for sending mass communications without having your own server infrastructure set up already. This makes me happy.