[lsllc]

Yes, I've had one on the top of my shelves in my office for years. Only recommendation is use a shielded cable between the PoE injector and the unit -- keeps it safe during t-storms.

I also have an ER4 the old UI a bit kludgey but they did revamp it a few years ago. I rarely connect to it and instead use UNMS to manage/monitor it (along with some other sites/devices).

These days, I just go with the UDM-Pro SE's and if I need more than 8 PoE ports, I add on a Unifi switch via SFP. You can do pretty much everything these days in Unifi, no need for EdgeMax (well, VLANs is about as exotic as my installs get).