MongoDB Atlas made it easy to get a fully managed database up and running for a personal project without worrying about server maintenance or manual setup, which mattered since this was a side project with no dedicated infrastructure budget. Storing expense and balance records as flexible documents fit naturally with how the roommate bill-splitting data was structured, without needing to design a rigid relational schema upfront. The free tier covered everything needed for a small user base, making the ROI excellent, and the setup process combined with clear documentation meant I was productive within a short time without needing any paid support. Review collected by and hosted on G2.com.

Since it's a managed cloud service, there's less control over fine-tuning performance at the infrastructure level compared to self-hosting, though this wasn't a real issue at the small scale of this project. Some of the more advanced querying and aggregation features have a learning curve if you're used to relational databases and SQL syntax. There's also no built-in AI-assisted query optimization, so understanding indexing and performance tuning relied on manual research rather than any smart guidance from the platform itself. Review collected by and hosted on G2.com.