Quick question would you buy it again?
I got the one for free I like it. The loud fan put me off, but after playing around with it the correct fans would make this really nice.
That's my big question for today. The fan puts me off also, but until I get an SP20 in hand today to test, I really have no competitor to compare it to. I think you are getting what you pay for with the S5. Since the fans were louder than anticipated, I just went ahead and bumped them up to 400M and they are rocking 1.3T with around .025% HW errors. With my two units, it was a rocky start, but I really have no complaints.
They appear cheaper made than the SP20, simply because of the flimsy plastic and no top/bottom. But you pay less for them also. By the time you down clock the SP20 and over clock the S5, the S5 will end up being cheaper $/gh.