I am Just curious would this be a good tool for a freelance website developer and/or designer to use for managing their projects and invoices?

i am considering of using it other than the usual Basecamp where the file is locally host on my server as for WHMCS they have 4 Payment options

Monthly Branded $16/Month
No Branding $19/Month
One-time Branded $250/One-time
One time No Branded $325/One-time

And for the addon it is a one-time fee of $100.00

So Has anyone had any experience of using this with their webdesign or freelancing business?