I own OMEGA and several Grahams. The quality is no less, even better. The case, dial, rubber, leather...all great.
As a brand, my only complaint of Graham is that they don't have in house movement.
For this model, everything is great. I like all number dial especially. The only drawback is the trigger... It is too simplified. If it is the trigger used on 43mm Chronofighter. I will buy one.