I've been searching for a while, for something just like this, I'm a freelancer so have lots of clients and keep everything straight with lots of small jobs, which makes admin a pain and spend more time doing it than I have time for.
I tried out the free account before taking the plunge, and honestly, the Price (I'm not in the US) is very affordable as the exchange rate normally puts software like this out of reach.
So Far Very happy with this deal :-)