I love Darkroom and it's a serious contender to Lightroom for me. It is just lacking in a couple of areas before I'd make the jump and purchase it, but otherwise, I love it and it's interface. I'll list some things that I personally think would make the app a total replacement to Lightroom: Denoise, warping, better recovery of shadows and overexposed highlights, a dehaze feature and better subject detection in masking. There's one thing that I find a little annoying, when I go to adjust a slider (across every device), I find that there is a slight lag (which feels like a jump) before it goes from zero to wherever you place the slider. It almost skips from 0-10, like it's trying to catch up. I need to overadjust before bringing it back if I want to make a small adjustment. I don't know if this is just my experience but I find that this slows me down a little. Maybe I'd get used to it, but it's not something that I love right now. Otherwise, I enjoy all the features in the app, it's awesome and very powerful. I especially love the presets sharing features and I can't wait for there to be even more of them from different users. I will be keeping my eye on this app and very likely buying it in the future as it appears to be improving all the time.