Best thing of invoice ninja is, OpenSource. It is totally trasp. & secure platform who want to own invoice creation software. User Also can host invoice ninja in there own server.

What I appreciate most about Invoice Ninja is its comprehensive web interface, which, despite feeling slightly outdated, offers a visually pleasing user experience. The platform has undergone significant improvements from v4 to v5, highlighting the developers' dedication to enhancing its capabilities. The array of features provided, especially considering the cost, presents exceptional value for freelancers or small businesses operating on a tight budget. The fact that Invoice Ninja offers such a robust set of tools at this price point is commendable and a strong reason to consider it for those who need a cost-effective invoicing solution.

The Flexibility and frequency of good updates. The developer releases new features every 2 months or so, sometimes even faster.