I agree with you. I mostly use MongoDB with Ruby and mongo_record. I find this combination so easy to use that I don't have to think about it (like driving a car). I always keep MongoDB running as a service on my laptops and it is installed but not always running on my servers. BTW, if you use Ruby, have you noticed how much faster mongo_record accesses MongoDB using Ruby 1.9.1 instead of 1.8.x? (Faster than I expected from the usual 1.9 speedup.)
