Enkidu,
You worry too much.
Before I bought my first SD, I googled for months on any adverse reports on SD, reading hundreds of reviews & owners' reports
Although SD has been sold since 1995, there has only been 1 adverse report on a SBGE001 which reported that the PR could not reach full 3 days reserve and the watch kept stopping. That was also the first batch of the SBGE001.
The GS SD winding mechanism is no different from the other GS mechanical watches using the mainspring to wind/power the watch.
Only the Swiss lever escapement ( even the Swiss are trying to improve this 200 yr old design by using DRIE/MEM etching technology combined with silicium or DLC coatings) is replaced by the tri-syncro regulator. The defect for that particular SBGE001 was not the SD mechanism itself i.e. the tri syncro regulator which is the only diffrentiating element between an SD and a purely mechanical auto. We don't even know if that defect was caused by owner's handling/operating not within recommended practices.... Anyway even if 1 or 2 defects reported is amazing itself...
How many horror stories have you read on other hi-end Swiss watches...
Most Swiss/German (e.g. GO,JLC) in-house movt watches have to be sent back to the manufactory itself for service as well and will cost between RM 1,500-RM 3,000 (non complication) whereas the GS service for Malaysia is abt USD 500+shipping. When its time to send any GS for service, just send it to Thong Sia in Malaysia or Singapore and they will courier it to Japan. Time taken between 1-2 months. I've checked with Thong Sia Spore & KL. Incidentally I was told that to-date no GS has been sent back for service or repairs although there are a number of Malaysian owners who bought them overseas. By the way GS recommended service is between 5-8 yrs depending on whether you wear the watch daily or not.
The SD is very hi-tech and can only be serviced by Seiko in Japan. In fact I've always wanted my watches to go back to its manufactory even if the local distributor can do the job....
So far I insist that all my JLC/GO goes back to their manufactory when its time for service or repairs (altho no repairs so far). The only watches I had serviced locally was a) my Omega PO Chrono which is no hi-end watch with a common FP1185 based Cal 3313 b) a ubiquitious 7750 driven B&R by Sinn
When its time to service the GS I will gladly and with peace of mind, send it back to Japan where it will be fully restored to its factory finished glory...

I know the Japanese work mentality very well as I've worked for a Japanese MNC for > a decade and have my highest respect for them. They always give 200% of their best efforts...and take pride in everything they do...no matter how menial..I'm afraid MOST locals and some caucasians don't come anywhere near that mentality....
Honestly would you prefer your GO to be serviced by SWATCH in KL or in Germany at GO manufactory...any difference between that and a GS.... or you still think that GS is a lesser watch...

easily, the best and the top quality from Jap watch maker, completely in-houe made, a lot better than most of swiss mid range watch, nuff said 
After examining what you guys brought along during the GTG, I believe the finishing is better than the entry level JLCs and GOs. Would love to get a spring drive. My one remaining concern is of course whether servicing is available locally and the cost of which......