I can tell you some stuff briefly.
The watch is heavy, robust, and extremely solid. I wear it twice a week. So far the time has been accurate. Its actually been as good as my Explorer II. The bracelet is naturally better on the Rolex as far as comfort goes, but the one on the Tag is really good too. I'm totally loving the sapphire case back, I think every single watch should have it. Some people are hesitant about the rubber bezel, but I actually like the look and feel of it. Granted it won't last a life time, but I'm sure it can be easily replaced.
I LOVE THE LEFT SIDE DATE WINDOW. Personally, there is not a single complaint from
me.
Yes the watch is heavy, I mean really heavy, but I happen to love heavy watches. The lightest watch I have is my EXP II.
There, in a nutshell.
As for price, I think $1300 for used one is reasonable, and $1600 for gray market. Granted Tag doesn't have great resale value but this particular watch is pretty superb.