This has become my go-to ski this season. I've found that it's such a fantastic blend between a lot of skis that I've been on before, and I always end up skiing it regardless of conditions.
On groomers, this ski is exceptional. I'm not an ex-racer, but I've found that the ski just really takes hold and carves on harder snow, and finishes well throughout the entire turn. Since the tails are relatively flat, they hold on really well, and you can feel a nice strong end to the turn. This has made skiing on groomers and harder snow a ton of fun. While fun, twin tipped skis like the Line Sir Francis Bacon, or even the DPS Wailer will start skidding or slarving their turns on steep, harder snow, these will just hang on and carve much better. They also are relatively stable at speed (more on that in a second).
On soft snow/pow, these also ski really well. They track well, and have good flotation. For me it's enough to have a great time when things get soft. They are relatively light, so they whip around and are very maneuverable in all sorts of snow. The only slight compromise I've found on this ski is in powder or in trees. Due to the pretty flat tails, I've found that I can sometimes get hooked up in a lot of uneven snow. They also don't pivot on a dime like other twin tipped skis, which makes you have to ski a bit more intentionally through tight trees. I usually know that by the end of the day when my legs get tired and I'm not turning as well, the tails aren't quite as forgiving as something dead easy to ski, like the Rossi Soul 7, etc. But to me this is a fine compromise, since it handles other conditions so well. Also keep in mind that this ski isn't quite a surfy/slashy as those other playful skis. It's a bit more business like in the powder, but also is more chargy to me than those other skis, and inspired more confidence to me on steeper lines.
In crud/chop and heavy snow, this ski is the most impressive to me. I've always loved the playful, light side of skis like the DPS Wailer, Line Sick Day, Rossi Soul 7, etc. Where they fell apart to me, was when I was trying to blast through chop or heavy wet snow (like a recent day in the back bowls of Vail in chopped powder under 48 degrees of sun). These skis would get obliterated and I felt like I was on a bucking bronco. The Nergy shares some of the playful nature of these other skis, but handles this snow SO much better and with less chattering/deflecting. Is it a Volkl Mantra that blasts through chop effortlessly? No, but it certainly handles its own, and to me it's also a lot more playful and fun than the Mantra. I think this is partly due to the partial titanium sheet you can see in the ski. It's the perfect blend between a ski with no metal, and one with multiple heavy sheets.
If you're looking for a fantastic all around ski that is pretty fun, light and agile, but also is a bit more stiff and charges somewhat more than a lot of the "playful" skis out there, this should be on your list. If you can't decide between something like the Montra or Bonafide (a bit too chargy and not playful) and the Soul 7 or Sick Day (a bit too soft and light), you should definitely check this ski out!