Not a huge Mongo customer, but the startup I work at uses MongoDB exclusively as our database across our different services. As someone who worked as an SRE at a database company with a DBaaS product, MongoDB Atlas is by far the best DBaaS platform I've used. From an operations standpoint it's fantastic.
From a developer standpoint it's alright, we're getting to the scale now where we're thinking about migrating to a more global architecture and I'm glad we're using something like Mongo over trying to hack this out with Postgres.
The standard issues with trying to use MongoDB like a regular ol' SQL DB still apply though, and our developers (me included) still fall into using anti-patterns and have to speak with solutions engineers once in a while.
From a developer standpoint it's alright, we're getting to the scale now where we're thinking about migrating to a more global architecture and I'm glad we're using something like Mongo over trying to hack this out with Postgres.
The standard issues with trying to use MongoDB like a regular ol' SQL DB still apply though, and our developers (me included) still fall into using anti-patterns and have to speak with solutions engineers once in a while.