I just recently discovered this project when i was googling for a windows compatible operating system. I use Fedora and i figured if you could run windows apps with wine on linux, they should make a whole os based on something like wine. So i found this.
I really like the idea of making an open-source windows compatible os, because many people don't switch to linux because they mainly rely on windows applications. But ReactOS, in my oppinion, resembles windows too much. I really dislike the windows desktop and interface and i think a promising project like ReactOS deserves some originality in its gui. The SymphonyOS project is a great example. They didn't use GNOME, KDE, or XFCE; instead they focused on a completely different idea of a desktop environment and made the Mezzo Desktop. I don't think that its necessarily what ReactOS should have, but i think its interface shouldn't be modeled after windows. Or at least, eventually, the user should have a choice of different desktops to use with their ReactOS system, so that they could use the windows layout, if they wanted.
Anyway, these are just some thoughts. I'm really looking forward to seeing what this project will develop into.