The system makes it easy & fast! I love how simple they keep their emails/texts in line w my personal account too which saves time when sending out bulk emailings through our salesforce automation tool (which we use daily). Nothing as such but if you are looking into buying this product then maybe try some other products before purchasing because there was nothing wrong about what i experienced while using them - just good experience overall :) Great customer service team who worked hard helping us get up an running quickly once purchased by me!! Sending mass text messages via SMS API integration within another 3rd party application has been made easier than ever thanks 2 u guys @Corporate Gifting!