It is very easy to use as it integrates with our CRM system so we don't have any issues keeping track or managing all aspects from 1 place! I wish there was an option where you could export contacts directly into Outlook/Gmail rather than having them imported in my mailbox first which sometimes causes me some confusion when sending emails using their templates (they ask recipients not send replys back).
If they can fix this then its perfect otherwise i think that's just something minor but would like more integration options between platforms such as being able print out invoices etc.