it is more bulky - even the Medium External Air is more bulky because there is a fixed duct intake on the firebox meaning you can no longer stow it easily on the floor of the back seat of your car
it is 50% heavier than the Medium stove which can be an issue for many
no side windows so less ambience if that is what you prefer
surprisingly, the front door opening is substantially SMALLER than the standard medium Nomad stove which is 17x17cm square - so you can't really fit thicker logs in, so most of the extra capacity it in the length of the firebox!
the absence of the top removable plate means you can fry directly on flames for higher frying temperatures - but you probably would not want to do this inside a tent anyway for safety reasons
I had considerable trouble getting it to start in cold conditions with no breeze
even using two fire starters and dry seasoned hardwood kindling, the fire starters would tend to go out very quickly due to smoke suffocation (this may be due to the long length of the intake duct not providing sufficient oxygen to get it burning or perhaps it is the additional shelf and longer path for smoke to go up the chimney - for all of this to work, you need heat inside the firebox to send smoke up the chimney and draw in fresh air)
I resolved this by using a air blower into the duct for a few seconds to get the fire hot enough to draw its own air, in addition, it seems important to put the fire starters BELOW the mesh and push them at least half way down the firebox.
I don't recall having this issue with the standard Nomad Medium with the front air intake
the accessories are much bigger and heavier - even if you get the Medium External Air as Winnerwell has made the chimney 3” (instead of 2.5“) for the Medium external air stoves
I had trouble getting the large pipe oven to 200degC - even moving it closer to the stove with only a short pipe section under it, the most I could get it to was 150degC - although this still burnt the top of my frozen Danish tarts which should have been OK in a 175deg fan forced oven or 200degC conventional oven so I suspect one may need to use lower than usual baking temperatures - for comparison, my Nomad Medium oven sitting on a standard chimney section would generally get to 200degC within 15min or so of having a hot dry kindling fire going.
it seems you are more likely to have longer periods of low temperature burns and perhaps more creosote build up
the wide pitch of the ash mesh allows more and larger burning to hit the floor of the firebox which results in the floor of the firebox being much hotter than in the standard Nomad medium and this mans you really do need to be careful what you have nearby on the ground - in any case with either stoves you should have a fireproof mat, but these do not stop heat transfer to under the mat and so tarps or tent floor material should not be under the stove
unlike Nomad stoves, there are no side hooks to hang the optional water boiler tank
the pipes seem much harder to get back into the stove for transport (the door is SMALLER!) - I gave up and left one of them out!
takes longer to set up and pack up as you have the additional ducts to join and un-join and pack away
the stove pipes are even harder to pull apart than the 2.5” pipes