I work for the chemical industry and am responsible for the sales in Austria and CEE countries. The application is only used by myself to manage the automated communications with my clients. I use the software in my home office and on the go. The main use case is mailings and series of timed emails.
I use 7Sheep for marketing as a sales person. This works well for me as a single user. I do not think I could use the software together with my colleagues. Although we could have separated lists the access rights might not fit our use case. It has a strong marketing focus and cannot replace a full CRM system.