So, I ski the Big 3 ie. Lake Louise, Sunshine, Norquay, so a mix of everything. They're awesome. Keep in mind, they're huge skis. Unless it's at least a few inches of pow, I just ride my head John 94s, which have no rocker or early taper. I use those for park too, they rock. On the Opus today I skied steep, mogul-ly, generally skied out runs, common resort runs, which had a few measly fresh centimeters on top. The Lines were so much more work to ski than something far narrower, and just not as agile edge-to-edge, of course.
Moving on to what they're made for...powder....oh my god. Honestly the best way I can describe the float is like having carvable hovercrafts attached to your feet. They really plane. The near center mounting point worried me about tip dive but they're boats that never sink, even going super slow. It's soo enjoyable being on top of bootdeep+ pow all of the time. They're surfy and smear nicely, and you can throw them sideways on top of the pow in a way that will blow your mind. Buttering in pow is made easier, and you never get hung up. They aren't so stable for high speed charging, however, being softer and more symmetrical than burlier construction charger skis. I mean, I can manage it but they really want to make shorter mellower arcs given the sidecut/early taper. That's Eric Pollards style, especially these days, after all.
On groomers, they're great, not blow-your-mind (well duh they are so wide), but great. Some people say "omg hellbents/bacons/eps/jjs/etc. carve SO insanely amazingly awesome good on groomers" but trust me take a narrow more directional ski for a hard corduroy rip, and it's a better experience. What I'm saying is, it's not the most ideal one-quiver ski one could think of buying. you do have better options.
There are better skis for "trucking" through the worst of snow conditions, stiffer, narrower skis that don't deflect/bounce so much. The trade off is that they are really poppy, a nice flex, which is the best in soft snow.
Line has made one damn incredible and fun-as-hell-to-ski POWDER ski. And you should damn well get them if you want a more dedicated pow ski. And you might agree with me or not for saying this, but, they are too pretty to take in the park. Their just so out of their element there design wise anyways. Like, they're beasts. If you can only have one pair of skis, from my personal experience, something around 105mm or less underfoot is way more practical, just feels easier. For pow and lots of it, the Opus is top-tier. Thanks for reading my brain spew of a review.