The intricate mosaic dial design and case finishing can indeed rival the venerable brands from Geneva. Case size at 39 is more suitable for those with smaller wrist. Complication of GMT is indeed useful for travel - just pull out the crown and adjust the hour hand away with date changes when reaching 24. The blue GMT hand and GMT hour markers are playful and legible that easily match with the white leather and even the blue strap.
I still find bracelet or rubber strap to be a better combo for this complication. But no complaint. This piece certainly is a high mark for Grand Seiko.
Pics follow. 
