My 2 cents:

I do some work managing a network for a house of 60 people. I've seen two of a smaller WD backup solution die on the job...mysteriously. Unfortunately, if you check the back of both your and my link, you'll see that there is no monitor / serial out. It's getting stuck on boot? Tough luck figuring out why.

Now, yours is definitely easier to pull the drives out of, so it's slightly definitely, but unless you have another machine handy to debug with, any glitches in the system are going to be hard to come back from. I've sworn off WD. On one hand, their devices cost barely more than that of the hard drives. On the other, their devices are pretty much just a case, a tiny motherboard, and ethernet / USB IO ports.

If that's enough to toss WD out the door, but you're still looking for a cheap solution, I'd personally recommend building your own el-cheapo server. It'll take time, and if you want good performance, you'll want a RAID card. But at least if things go sour, it'll be recoverable.

Technically the drives from those WDs still work, but now they are sitting in an old desktop running centos and XFS.

Hope that's not entirely useless ramblings^^