Pros: performance; value; not really a true telemark ski (if you are primarily looking for a xcountry touring ski)
Cons: not really a true telemark ski (if you are primarily looking for a downhill-oriented ski)
This ski is identical to the Karhu XCD Guide. The "XCD" stands for "xcountry-downhill". These skis are marketed as a hybrid between a xcountry, and a telemark ski. From my perspective this ski is first and foremost an off-trail xcountry touring ski- with some moderate downhill performance. This ski is perfectly designed for classic stride and glide xcountry skiing in deep snow/fresh powder. With a 109mm shovel, classic camber under foot, straight tail, effective waxless base, and a tail notch for skins- this is truly the go anywhere xcountry ski! This ski is most commonly used as a light telemark-touring ski (with 75mm tele bindings)- and for good reason. However; I also highly recommend this ski for off-trail classic xcountry in deep snow/powder.
On an everyday basis, I am using this ski with NNNBC Magnum bindings, and Alpina Alaska boots; as a light-duty off-trail xcountry system. I use this same ski with 75mm-3 pin-cable telemark bindings in mountainous terrain.
My everyday skiing has always been off-trail, backcountry, kick and glide xcountry; on rolling terrain with the occasional steep climb and descent. For most of my years I have always assumed that something as fat as the Annum is really a telemark ski and have reserved them for that use alone (with 75mm telemark bindings). (In recent years I have only needed telemark gear a couple of times a season.)
For a few years now my everyday choice has been the Madshus Eon/Karhu XCD GT (83-62-70mm) with NNNBC bindings. I have always been very pleased with the Eon, especially when I manage to maintain my own backcountry "track." I have never been thrilled with the Eon when I am breaking trail- especially through deep snow (this happens to be my passion).
At the beginning of the 2013-2014 season I bought a fresh pair of Annums and mated a NNNBC binding to them. The result? Pure, thrilling, efficient, stride, kick, glide, and light telemark. I am actually blown away to discover that the Annum is truly a classic off-trail xcountry ski in disguise as a tele ski. It has smooth and snappy kick and glide, breaks trail effortlessly, and tracks very well.
The NNNBC binding brings out this performance. The design is brilliant. There is just enough progressive sidecut in this ski to be able to turn it when you need to. But, it has quite a straight tail and tracks beautifully. In all honesty I have never been thrilled with this ski as telemark ski (I have used them as such with a 75mm tele binding). There are many other choices out there with more of a parabolic shape that turn more efficiently, and offer better downhill performance.
There are different perspectives on what a "true" telemark ski is. My perspective is that telemark skiing is first and foremost a downhill skiing method and system. I see these "hybrid" skis as first and foremost xcountry skis. I am not suggesting that they cannot be used as telemark skis. I am suggesting that if your primary pursuit is downhill performance-there are better options out there.
Although the Eon has always been marketed as being "more about the tour than the turn," I would argue that the same goes for the Annum; and that suits me just fine.
The performance of this ski is fundamentally tied to the binding/boot system.
75mm nordic/telemark bindings are without a doubt the most versatile and flexible setup- ranging from classic xcountry, to light telemark.
However; NNNBC binding/boot systems offer much more efficient classic xcountry performance (i.e. stride and glide).
For my everyday skiing- rolling terrain with only the occasional steep descent and climb- I much prefer the NNNBC system. If my backyard skiing had much more vertical to it- I would be on 75mm.