I posted recently about my first Grand Seiko (the Snowflake). I like it so much, and also because I happened to be abroad and was able to get it for a good price, that I bought a Hi-Beat GMT (SBGJ003) to go with it, making for me the ideal GS pairing (light and dark dials, spring drive and hi-beat movements, titanium and steel construction). Perhaps needless to say, I like this a lot too! Build quality is again superb, and the dial is very special, with a very subtle sunburst type texture which is only apparent in certain lighting.
It wears very nicely; I was a bit worried about the thickness (listed at 14mm or so I think), but something about the case shape and the way it hugs my wrist makes it appear not nearly as thick as that.
The one thing I'm very slightly disappointed about, and I know I shouldn't be, is the accuracy: +5.5 seconds per day after a week. I know this is within spec and perfectly fine for practical purposes, but I was hoping for something really good from the hi-beat movement (the snowflake was +0.1 seconds after two weeks!).