I'm a self employed graphic and website designer and I have over 50 clients on the books. In a typical week I'll be working on at least 10 different jobs. Because of the nature of the work I often have to wait for a client to respond to a question before I can move onto the next stage. This means that in any given day I am working for at least 4 clients, usually more. To make things more complicated I charge depending on the work with 2 or 3 different payscales per job.
Without Paymo I'd have to do this all by hand, or guess what projects I had spent time on. With Paymo I can easily just move from client to client or to a different project for the same client at the click of a button. At the end of the month it's easy to generate invoices and the clients can pay online.
Honestly, if someone took Paymo away from me I'd sit down and cry. It is vital to the way I run my business and it frees me up to get more work done, and be paid accurately for it.