Preview was pretty cool, and for the most part still is, but now it doesn't update any more when viewing a PDF not in page mode but in continuous scroll mode. That basically means I cannot use it for previewing Latex PDFs anymore.
Skim.app is very suitable for Latex PDF preview (it even supports syncing given you have an Editor that supports it too, e.g. Emacs AUCTex or TexShop).
