The model I bought didn't come with and RAM or drive, so I had to take a guess on the type of RAM to buy in particular which was DDR3L-1600.
I've had this running for about a month now, and have been very happy with the feature set, and ease of use.
I ended up pairing it with a 120GB mSATA and 4 GB of RAM since I was going to need two VMs to make my setup work.
I've been using it for about a month with Ubuntu 18.04 as part of a research project and so far no issues to report.
I work in IT and we've probably got 10 of these bare-bones units with a small mSata and 4GB RAM running pfSense in production and haven't had a problem yet.