Freshbooks is my personal assistant!
Using Freshbooks has completely transformed how I run my business. I've been using Freshbooks for almost 5 years, and prior to that I kept track of everything in multiple Excel spreadsheets. From client database, to tax reporting, Freshbooks is my go-to for my freelance business, and I credit the ease of use to making my transition from part-time entrepreneur to full-time entrepreneur seamless and stress-free. It's especially helpful now that I take on sub-contractors, that I'm able to manage their time and invoices all in the same system. Can't wait to try out the new, improved version!
Didn't try others.
.... I was using Excel, need I say more? ;)
Invoicing clients, time-tracking.
I save a ton of time when it's time to file taxes, because if I've done a good job tracking things throughout the year, end-of-year is painless!
Immeasurable, but high :)