I use a 218J and it's great. I use it for backups, storage, and my Lightroom library is split across my NAS and my local storage.
For remote access I use a VPN tunnel to my router and get in through there. The upstream Internet bandwidth is a limiting factor though. I have 10Mb/s, which is not great. 40Mb/s is clearly better.
However... Synology has decided that in a new NAS deployment you no longer get some HDD features on some of its NAS devices unless you purchase a drive from Synology. They sell Toshiba and Seagate drives rebranded as Synology. So buy a Toshiba drive from Amazon and you won't get those features. Buy a Toshiba drive from Synology with a Synology label on it and you do.
Right now this seems to affect the + series only, and there are simple workarounds, but it's still something you should be aware of if buying Synology.
arstechnica.com
For remote access I use a VPN tunnel to my router and get in through there. The upstream Internet bandwidth is a limiting factor though. I have 10Mb/s, which is not great. 40Mb/s is clearly better.
However... Synology has decided that in a new NAS deployment you no longer get some HDD features on some of its NAS devices unless you purchase a drive from Synology. They sell Toshiba and Seagate drives rebranded as Synology. So buy a Toshiba drive from Amazon and you won't get those features. Buy a Toshiba drive from Synology with a Synology label on it and you do.
Right now this seems to affect the + series only, and there are simple workarounds, but it's still something you should be aware of if buying Synology.

Synology could bring “certified drive” requirements to more NAS devices
German press release suggests expansion of the company’s “integrated ecosystem.”…
