I will break this review up into multiple parts, so you can make most of it:
1) The service is excellent. Seiya-san was prompt in response to questions and the package was shipped and delivered promptly.
2) The watch looks amazing and the polishing is indeed very beautiful. You will not regret the looks of the watch.
3) The second hand does NOT hit the middle of all markers, which is annoying. Grand seiko makes not such guarantees (apparently) and paying premium price wishing for a watch that is perfect only to find that the second markers are missed about 40% of the time is truly disappointing. In fairness, this might just be my fault for not doing proper research. In fact, seiyajapan.com has a dedicated page explaining why second markers may not always hit (unfortunately I saw it after the purchase). If you wish to buy, you may try asking Seiya-san for a piece that is perfect. He may or may not oblige, but worth trying.
4) In retrospect, I think this watch is a expensive for what it offers. The main reason I picked up SBGX261 was because I have small wrists and the small dial works pretty well. However, you may be able to find cheaper watches which offer similar accuracy (e.g., SACM171). Again, insufficient research from my side.
Do proper research and know that unlike popular belief, second hand may not always hit the marker.