platform with 8MB DNG files.. The first half hour or more was frustrating figuring out how to use the software; I'm one who just jumps in and trys to use it. So, I went to the help files and a few sites online. Here now a day later, I am impressed with the ease of altering photos.
Mind you, it is NOT a replacement for Photoshop; doesn't even come close to the depth of PS. It doesn't replace Adobe Camera Raw either (LZ has no batching or multiple photo grouping ability). But for working on just one photo at a time, it has a unique and intuitive (imho) approach to handling the darks, midtones, and highlights---the zonemapper. You can click/select a tone and move it brighter or darker, and if need be, you can click/select a different tone first to prevent it from moving while other tones move.
I'm on a 2 year old Celeron chip with 2GB of ram. Editing does not seem slow with the aforementioned files. Using the browser, though, is slow------building the previews takes a long time for a folder of DNGs.
They say it runs with Java and I don't know what Java I have but I had no install problems.
This software has a ways to go to mature into a fully professional product, but the learning curve of its image enhancement techniques is a step in the right direction for those who have worked with the zone system or with f/stop enlarging (i.e. basing adjustments on f/stops)..