WHOO, I am so excited to write this review. This is my first (independent) harness!! I've previously gotten, and reviewed, the O-rider strap-on with built-in harness, made of a soft and stretchy elastic material that is indeed comfortable and serviceable - but not super sexy. I was a little worried about how comfortable, and how flattering, a leather harness would be, but the Diva blew me out of the water.
The Diva harness is constructed of two hip straps (independently adjustable via buckles); two between-the-thigh straps (also individually adjustable, via two D-rings per strap that they loop through); and a lace-up corset back.
The harness represents another product, like the thigh restraints I reviewed earlier, in Eden's foray into delightfully well-made faux-leather gear. The material is thick and clearly high quality. The underside is lined with an extra-velvety material for maximum comfort and a luxe feel. The buckles are sturdy and shiny, with additional silver fastenings at the jointures for extra-sexy pizzazz. In addition to the D-rings for the leg straps, there are two additional D-rings on the back to loop extra strap material - or even attach some other accouterments. (For instance, they're great if you're a power bottom and want to restrain your sub's hands.)
The design features a metal O-ring at the center front for your dildo of choice; the metal ring is also surmounted by two rubber O-rings of slightly different sizes for extra security. They do their job well, my dildo didn't budge!
There is a lot of adjustability. Each hip strap comes with 9 holes per strap, and room to make one or two more. I'm on the slim side, so the corset in the back doesn't get *quite* as tight as I'd like. It would be nice if I could get it snug to offer extra support. I also had to tighten down the thigh straps A LOT (we are talking a good foot and a half of extra material). The good news: they should fit curvy thighs and booties just fine! But they were a bit too long to leave hanging, even if I stuck it through the extra D-rings, so instead I crossed the extra strap material across the back and tucked each end in at the front of my hips. It works well, and the crossed straps in the back give the harness even more sex appeal.
Speaking of sex appeal: it's CRAZY sexy. I mean, even *I* want to fuck me. I was worried about how flattering it would be for nothing; this thing could make anyone look smoking hot. I'm no exhibitionist but I feel like I could be put on display. I simultaneously want to top more just to wear this harness, and *be* topped more - by someone wearing this harness!

There are only two possible issues I can identify.
First, If you are particularly petite, this harness may not work too well for you. The long leg straps can be dealt with, like I did, but the corset back might not fit a small torso.
The crotch piece, which is stiffer in faux leather than with a more elastic material, could cut into the thighs if you have very narrow hips. It measures about 4.5" at the O-ring. It is just a little uncomfortable on my thighs when I have my legs close together, and I am hoping that with continued use the material will relax more. Either way, it's not a deal-breaker personally.
Second, the O-ring is a little small for my preferences :P It's a 2-inch ring from outside to outside, which gives about 1.75 inches of space inside for dildo insertion. For a small-to-medium dildo it will work perfectly, but anything on the large side is a no-go. This isn't ideal for me and my fellow size queens, but it won't be a problem for some.

For care and cleaning, I would follow the same protocol for this that I use for steel-boned corsets: a wipe down with a wet cloth as needed, and spritz with high-proof alcohol (rubbing alcohol or vodka work well) to kill bacteria. However, it should be fine to hand-wash with detergent if you prefer, as long as it's dried thoroughly.

The takeaway: I'm over the moon about this piece. If I'd known how great I could feel in a harness, I'd have gotten one ages ago! This will suit both beginners and experienced users, and will DEFINITELY suit anyone with a leather fetish.