Re: Nuts to them all. MongoDB is web scale.
I agree, with qualifications.
For use cases that have very many more reads than writes it's an excellent choice. If a lot of inserts and updates are needed then everyone gets to wait. I've been bitten by that one.
The other problem is that it ignores the extremely useful type constraints, everything is a string. There's an argument that if you are using a dynamically typed language (Perl, Python, Ruby PHP, nothing really common) then that might even be a better fit.