Well, have had the 6TB My Cloud for a couple of days now and really like it! Love the RAID configuration with ability to hot-swap a drive if one goes bad with zero loss of data! The App on my iPhone works great for accessing the drive remotely, as does the app on my Macbook Pro! It is completely quiet too, so that's a plus.
However, after I had received it and played around with it a little, well, guess what - I saw the 8TB version had ton on sale again for only $40 more than I had just paid for the 6TB. What to do? I called Amazon and explained my frustration and that, had the 8TB been that price when I made my purchase, I'd have bought it instead. Well, I am a Amazon Prime member and I must say, I was happy with the service! The guy allowed me to buy the 8TB right then and there and at the same time, issued a full refund on the 6TB model. He then emailed my a link for a shipping label so that, as soon as the 8TB version comes, I only have to pack up the 6TB version and ship it back at no cost to me! So, after Monday (estimated arrival date), I will have the 8TB version rather than the 6TB. In the RAID 1 configuration, it's really 4TB, but still, the extra dual 1TB storage is worth another $40 I'd say.