After using 2 different local install and 2 web-based invoicing software, Invoiced has easily been the most effective one thus far. There are bigger apps and software. There are probably more robust and integration featured software: There are tons of ways to tie together all your account into a central management program. There are many other options, but when you take away all the complexity and vastness of the others, you get something concise, easy to use, and quite frankly beautiful like Invoiced. Creating and delivering invoices, its primary core, is what it shines at. I started using it when it first came out. It was free: It was practical: It did exactly what I needed. Since then it's grown, a lot, and continues to be honed at an incredible rate. Here are some of the things that really enticed me to move to a paid account.
+ Feature rich, but not to heavy
+ Synchronizing with popular accounting software
+ Integration with a wide variety of merchants
+ Visually concise - Simple at-a-glance summaries
+ Provides almost every possible payment option available, including Bitcoin and direct banking
+ Pricing platform is more than fair
+ Gives invoice recipients the benefit of submitting payments
+ Mobile app is a great representation of the desktop experience
+ Support is quick and friendly
Now, with all that said there are a few thing that I can see some people having trouble with. Especially if you're moving from a local install program to a web-based one, or a larger piece of software to this.
+ Importing data isn't really an option (At least I haven't really found a way)
+ Like accounting software, not everything is intuitive unless you know invoicing/accounting
+ Can't work offline - For some this will be a problem
I can't really speak too much on what bothers me about this software. As a freelancer with a small clientèle, I don't face the same accounting issues a medium to large business might face when dealing with multiple clients and billing hundreds of people.