Buckle your seatbelt
First off, if you don't like aromatics, then disregard my rating. This tobacco is a blast of flavour, both from the topping/casing and the underlying tobaccos. It is practically impossible to smoke this without paying attention to it. Not an all-day smoke. I think you might fry the taste neurons in your brain if you tried.
The tin note will knock you on your back and make you wonder what you're in for. The tobaccos themselves are a mix of cuts from ribbon, large leafs to cube. A mix of shades from dark, dark brown to light tan. No moisture problem. Can smoke it right away. With a blend like this, either dedicate a pipe or just accept that your other blends will fight with the ghosts from XSM.
The flavour is strong, but also varied. Different flavours come and go as the different tobaccos start smouldering in the bowl. The wife loves the room note/moustache note, but this isn't an aro which scents the room but leaves you wondering if you're just sucking hot air. No goop in the bowl that I've ever found. Burn rate is about medium.
Black currant is one of my favourite flavours, and I picked this up specifically to find that. I also have PS Black Currant Cavendish on hand. I actually find it's easier to gain perspective on XSM when I compare it to the BCC. XSM is stronger, and seems to have a greater variety of tobacco flavour. BCC is more monochromatic. Maybe it's the difference between an American and a German tobacco, I don't know. XSM is a treat when I want it, which isn't every day.