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So, a year after buying the first, I liked it so much, I bought a second one, because we needed even more capacity on our home network. It's a reliable workhorse, easy to install the drives, easy to set up, easy to connect Windows, Mac or Linux to. The documentation is clear and easy to read. I only ever contacted tech support once, but it was a very positive experience. I've only used a few of the zillions of features it offers, specifically RAID 5 as primary storage, shared user folders, the built-in anti-virus app (looking at the logs made me realize we needed anti-virus on the one Mac in the house), and the $4 exFAT add-on to plug USB drives into the back of it (transferring data off said drives onto NAS).
When the time comes, I'll either buy a third one, or start looking at the larger Synology units. I've been very pleased with Synology.
I am not sure why people are reporting any type of negative reviews on this device. It acts as a great small business file server, or a home file server where you have important documents and pictures you want to back up to another device. The UI is a little outdated but who cares. For anyone getting bad ping times, make sure your device is on the LAN via ethernet versus over wifi and make sure your device is on ethernet just while moving documents. I use Google Home and Google Wifi to have my iMAC's and my PC on the LAN via Ethernet using the wifi mesh to tie back to my cable modem and it works flawlessly. This device does the job!