It's a long story of constant failures. The short version is they charged my card immediately, but didn't ship until three weeks later (after I brought it to their attention). It still took them a week or two to finally send it off. When I got it, the wifi dongle was the wrong one (physical connector didn't match). They spent another month getting me the correct dongle. Then the S9 booted straight to an error. They made multiple appointments with me for troubleshooting, then would no-show on me. Meanwhile, this took tons of emails back and forth, with D-central often taking a week or two to reply, including threatening me with slower response time if I didn't act happy about their mistakes.

I'm pretty much soured on the idea of home mining after that. I would have been better off using the money to buy BTC, and my time spent doing almost anything else.