Well, I guess it couldn't last. For two months my out of the box SARB035 hovered around atomic time. It lost 1.7 sec/day on my wrist and gained about that on my nightstand. So, by laying it down, face up, every night, the watch was always within a couple of seconds of quartz-time.
But now it has settled in. It's losing a predictable, reliable -17 sec/day, with no positional variance at all.
So it's no better than my ETA 2824-2 (Tissot), and quite a bit bulkier.
However, I love the looks of the Seiko, especially after I put on a leather strap, and will continue to think of it as my poor man's Grand Seiko. Now I just set the watch every Sunday morning ahead a minute or two.