KURTTAPPE  My review of this plugin is highly varied. First of all, it's *way* better than not having any QuickLook preview at all. You can get a general feel for what is in the document. And the sidebar list of colors and fonts is an amazingly useful bonus that one really wouldn't expect.

*However*, the text in the documents does not get rendered. You can see where the linebreaks are and the general layout, but you can't read the text--it is replaced with blurry grey bars. So if you have two similar documents, you cannot tell them apart. Given that other QL plugins do render text I can't fathom why this one doesn't. The lack of text makes this feel like a Beta version where the authors say "Wait until the final; we'll get text working by then." But since it's been nearly 2 years since SneakPeak was released, nobody should be holding their breath that it will ever be added.

I don't want to join the "this costs too much" crowd except to say that for $20, it really should render text. Without that feature, this plugin should cost about half what it does. That's only fair.  
(Version 1.3)

KONG  Of course, either Apple or then Adobe should have included this feature eons ago, especially in a high-tuned OS as is OS X 10.5. I don't understand e.g., that although embedded in the document, InDesign won't show me the preview of the document I want to open, when I hit «command + open» from within the application. At least InDesign itself should do that.

Since installing SneakPeek Pro I can see it, yay! Not only the previews in the Finder, which – whatever the quite hefty prize tag – makes it money well spent. Just to finally have that feature at your hands is awesome.  
(Version 1.2.1)

PEKIYASIMDI  It is not good for me. When you look a document (whatever it is: eps, fh, indd or ai), it does what it is expected. But when you want to look another document it shows inside of the first document you look. :(  
(Version 1.2.1)

BEIGE  Stop whining about the price - this thing is actually quite useful and worth it for my magazine. I can see what spot plates and fonts are in our Indesign files with a full preview - in the desktop.  
(Version 1.1)

STORMCHILD  I wouldn't say that the work that went into this isn't worth $20, but it's pretty annoying that QuickLook doesn't support .ai files without a plugin, since the entire OS X display system is PDF-based.

A better solution, going forward, would be to save Illustrator documents in "Illustrator PDF" format, which should display in QuickLook with no plugin.

They did do a decent job on the plugin, but I'm really not looking for lists of colors used in the document and things like that -- I just want QuickLook to display .ai files the same way as any other image file format (other than gradient meshes, which are apparently never going to display correctly in non-Adobe software -- unless those are part of the PDF standard that Adobe just submitted to the ISO).

The clincher is that this plugin does not understand layer visibility, so all the layers I have turned off show up in the preview. This makes it borderline useless.  
(Version 1.1)

GCOGHILL  It might be $20, but it not only does what it says, it has a lot of great features beyond just a preview.

$10 and I would have already bought it, but I find more and more that it would be really handy after demoing this and might bite the bullet anyways.  
(Version 1.1)

LOWFI  A 20 dollar quicklook plugin???  
(Version 1.0)