I've smoked a fair amount of this since I got it from UserName about a month ago. It is a good tobacco, I recommend it, and while it may not be a permanent part of my cellar, it will be a regular.
In the tin it is an attractive, medium to wide, thin, medium brown flake. The flakes are about the thickness of the cloth used for an Oxford shirt. The mix of dark and light brown tobaccos make for an attractive medium brown flake. The smell, pretty strong of alcohol. Spiced rum and earthy aromas.
I have always done some variation of the fold and stuff (sometimes adding some extra twisting, or cutting up some of it to put on top for easier lighting). I've smoked it mostly out of one of my Savinelli 320KS pipes (the Tundra), but also used others. It generally lights fairly easily and stays lit without too much protest.
I've mostly smoked it outside, once smoking it in my car with the windows and sunroof open, so I can't say anything about room note. It does have a pleasant smell fresh off the pipe, definitely a rum based aromatic smell. Just a hint of roasted nuts (probably from the burley in the blend).
The taste is definitely strongly influenced by the rum casing. It is definitely a sweet tobacco due to the Cavendish, Virginia and rum components, but still not overpowering. There is a definite burley nuttiness in the tobacco as well. Overall, a pretty well rounded flavor where, while there are hints of the various components, the flavors blend quite nicely.
The bad? I absolutely love my MacBaren Vanilla Flake, so much that I will never be without. I may have been expecting too much. In comparison, this is a pretty average tobacco. It is good, but definitely not up there with the Vanilla Flake (to my tastebuds). The other big negative, like many alcohol cased aromatics, it can have a nasty bite if you don't smoke it carefully- I almost forgot what tongue bite could be until I smoked this a little too fast (OK, a lot too fast).
Overall, like I say in my first paragraph, it is a good tobacco. A mildly aromatic tobacco (from the rum casing), that doesn't totally taste like an aro. It tastes good, smells good, and I suspect has a nice room note (I have to try it in my apartment sometime, but my roommate really hates when I smoke inside and he lives here too so I try to be considerate, so it may be a while). I like it enough that I'll keep it on hand pretty regularly, though it isn't a Penzance, Perfection, Vanilla Flake, Frog Morton, Solani Sweet Mystery X, or a few others that I will always have on hand.