A very nice and easy to use software. I used it to type up my entire PhD thesis; except for a single instance where the software hung up I did not experience any issues. I gave up using TexShop once I got Latexian because it accepted all the packages without my having to decided between LaTex, Tex, XeLaTex and whatnot.

Absolutely the best editor yet. Auto-completion, life preview. Just what I needed. Maybe a tiny bit too expensive, but that's probably because I'm a guy with no money.

I've tried texshop, textpad, scribo, ... This is the best one by far. All the others had flaws.

Just one request : I don't like the temporary files cluttering in the document directory while the application is running. Can those files be hidden?

Is there a possibility to jump to an exact location from/to the pdf preview and the source text by clicking on either ? For me this feature is more important than the online preview.

I've found Latexian to be very stable and mature software, despite only being 1.0.x. The instant "live preview" feature is a Godsend, and the ability to see your file hierarchy as well as the navigator makes it very easy to arrange large projects. I work with multilingual texts using XeLaTeX, and Latexian has had no problems with any of this. I've been using it as my main (Xe)LaTeX editor for over half a year now (since it was in beta), and have written a large part of my PhD dissertation using it. The developer is very friendly and responsive, and has fixed bugs very quickly. While it's not free like the excellent TeXShop, I find that its features -- such as the live preview, fold selection, tabbed interface, navigator, clips, preview errors in the gutter, code completion, and others -- make it an excellent LaTeX writing environment. It is easy to customise to one's liking. While there is definitely space to grow (I for one would like ConTeXt support in the future), it serves excellently for what it is meant to do -- to write undistracted in LaTeX.

I gave Latexian a thorough try out, as I said that I would do.

Previously I've used BBEdit to write Latex docuements, kept as BBE Projects, and I processed them through TeXShop. This has required constant switching between subsidiary documents in BBE and the parent document in TeXShop. The process was also slow, with most time spent waiting for the appearance of the typeset documents. It was a frustrating process, even with the aid of some scripts to speed it up. I've also tried other document production systems, including TeXMaker, TeXWorks, TeXFoG, LyX, and Publicon, which I used for years (though not for LaTeX).

With many free apps available, I never thought I'd find one I'd want to buy, but Latexian is it. The speed of the Live Preview has to be seen to be believe; nothing else comes close. You can see and fix complex expressions essentially in real time. The navigation system is very intuitive. The Preview File feature means that I can typeset or Preview directly from a subsidiary document without having to switch to the main one. The clippings library has also proved essential for saving and retrieving expression templates. Code completion is also a time saver. The regular expression support is excellent and the multi-file batch find is very usable.
I've also corresponded with the dev, and he's proved very responsive.

Latexian still isn't perfect yet; I don't like the layout of the Quick Insert palettes, for example. But, to my mind, it's the single best Tex production application around.