I've used this for months. It stops working for no reason. I think it eats up too much memory and keeps increasing memory usage. I don't know, but I know it crashes after a few days.
I've had a shout server running on my DO droplet for 8 months now, and I've never had any issues.
I run it using nginx and Passenger (and the setup was quite simple, I had never set up a node app in production before doing this).
I used it until I got the crashes just like parent.