I worked on a project where we used Mongo to collect analytics and while it worked, there were always problems. We had a problem with our shard key so one shar

I worked on a project where we used Mongo to collect analytics and while it worked, there were always problems. We had a problem with our shard key so one shard received more data which crashed it, overloaded the other two shards and crashed the whole system. A second issue we had was trying to read from Mongo while we were storing data which caused a lot of lock contention. The question I have is, knowing what you know now, would you have still gone with Mongo?