This is excellent wine. But wines cost money, and it is necessary to relate their cost to the experience. In this case, for $300, I would suggest that 4 $75 bottles of Andrew Will Sorella 2015, is a much better investment than one bottle of this wine. This wine is denser and less berry tasting, so deeper, and more syrupy. But this is more like whisky or liqueur than wine, at least to me, and my wife and I had a bit of difficulty finishing it, whereas a bottle of Sorella would have definitely disappeared. So my suggestion is that if you only want to taste it, you go in with 3 other people and each have one glass of this wine, whereas if you want to drink the whole bottle yourself at dinner, go for the Sorella, or maybe a Chateau Talbot. If you really want a Dominus, I suggest the 2014 at $230, is essentially the same wine as this more expensive wine, probably just because someone gave this one 100 points. At least my memory from a few years ago of the 2014 was basicallly the same as this. long story short: dense, concentrated, excellent, but over extracted, over priced wine.
Note that some people are reacting only to a tasting they had at an event, where they may have been given it for free. In that setting , of course do it! But if you are buying it, I offer my advice.
At a similar price point, I prefer the Leoville las Cases 2003.
remark: Because of the notes here, I decanted it 3 hours, but felt that although it smoothed out, it lost a bit of intensity, so of course as you no doubt always do, taste as you decant.