I've been using this harness exclusively for over 2 years now and I definitely have some thoughts.
Initially, I LOVED it! I was looking for something to replace my Petzl Luna (my first harness ever) which was wearing through in the webbing of the leg loops. At the time I was just getting into more trad leading, and I was drawn in by the color, the price, and positive reviews.
Initial impressions: I loved the colors, it fit me well, and had the basic features I was looking for. I like adjustable leg loops for my muscular legs (fixed are a no go for me) and an auto double backing waist buckle. It's lower profile than my Luna was, so it packs down really well.
I've used the anti-crossloading slot, but honestly it's a bit of a pain to set up, so I mostly just use the belay loop in the normal fashion without bothering to thread it into the rubber slot.
In the past 2+ years I've used this harness for single pitches, multipitches, sport, trad, and ice, from Indian Creek, to Yosemite, to the Red & New River Gorges. I'd say my favorite applications for it are non-project sport climbing, and light and fast multipitch objectives.
When fully loaded down with gear, on say a long Indian Creek pitch, or a variable multipitch trad route, the waist belt will dig into my hips uncomfortably. I've ended up with bruisy tenderness on my hipbones after spending too much time wearing it fully loaded up. It's also not the best for hanging in. I've definitely ended up with sore thighs after spending too much time at hanging belays, or long rappels.
In the search for something more comfortable for hanging in and loading up fully with gear, I just purchased the Edelrid Solaris, but I intend to keep my CAMP Supernova for sport climbing, light-and-fast alpine objectives (where I'll have less gear, and be more willing to endure some hanging belays for the sake of weight in my pack), and maybe some single-pitch (non-Creek) trad cragging.
I can definitely speak to the durability of this harness, as it's seen a lot of use on all types of rock, and it's still in great shape!
My measurements are around 28" waist and 23" thighs, and the size medium fits me well.