As stated in the linked article above, opinions vary, which isn’t surprising given that these watches are all Chinese made, illegal counterfeit goods, put together by cheap labour in less than ideal conditions. I’ve had three watches with SA3135 movements and no trouble from them whatsoever. By coincidence, the only 3135 movement that I own that has problems (won’t hand wind) is in an ARF v2 DSSD - and it’s an SH3135. My takeaway from this is you might as well bag a bargain and take your chances - knowing that the movement can always be replaced, for less than the cost of upgrading the order to a watch with a “better” movement (which, like mine, may also crap out).