Pros: versatile performance; value; durability; not really a true telemark ski
Cons: not really a true telemark ski (if you are primarily looking for a downhill-oriented ski); jack of all trades- master of none?
This ski is identical to the Karhu XCD 10th Mountain (99-68-84mm). This ski is marketed as a hybrid between a telemark and a xcountry ski (i.e. "XCD"). This ski is commonly used as a light telemark-touring ski with 75mm telemark bindings. However; I would also highly recommend them as classic off-trail xcountry skis.
Perhaps the best way to review this ski is by comparing it to its two siblings: the Madshus Eon (Karhu XCD GT) and the Madshus Annum (Karhu XCD Guide). The Epoch sits in the middle, as far as width. My perspective is that the Epoch is a jack of all trades, but perhaps a master of none.
First of all, from my perspective, all of these skis are designed to be first and foremost off-trail, classic kick and glide xcountry skis- with moderate downhill performance. Yes, they do have a progressive sidecut- they will turn on the downhill. However, these skis have quite a straight tail, and track very efficiently during the kick and glide (this sacrifices some turning efficiency). As far as telemark skiing; there are other skis that offer much better downhill performance ("true" telemark skis). The Eon is marketed as being "more about the tour, than the turn". My perspective is that this is equally true for the Epoch, and the Annum.
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 light telemark skis. I am suggesting that if your primary pursuit is downhill performance there are better options out there.
The Epoch sits in the middle between the Eon and the Annum. The Eon is the slimmest and has the best glide. The Annum is the fattest and excels when breaking trail through deep powder. The Epoch, I assume, is supposed to split the difference and be good at both. Although this is an excellent ski; I find that it doesn't excel at either glide, or flotation. When the snow is dense and hard, and you can really cruise- the Eon will perform better than the Epoch. When the snow is deep and soft- the Annum will offer better flotation, and break trail more efficiently than the Epoch. In short; I currently have the Eon, the Epoch, and the Annum to choose from. I find myself choosing either the Eon or the Annum and leaving the Epoch in the shed.
On the other hand, if you want one ski for light-duty off-trail xcountry, this ski may be the best choice. As an off-trail xcountry ski- the Epoch is good at everything. However, it is not the best at anything.
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 offering 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.
For my everyday off-trail xcountry skiing I use these skis with NNNBC Magnum bindings and Alpina Alaska boots.