I am seeing a lot of sites using the Snap Preview Anywhere. I just cannot understand why people are using it - it adds almost no value to the page.
Only the title is readable
If you can read the text in the linked page, there will be some advantage - but the only thing that can be read using the Snap tool is the heading of the page. Yes, knowing the title is useful - but you don't need a screenshot for that. The '<A>' tag has a 'title' attribute that does the job ver well.
The rest of the text is unreadable because the screenshot is small. No - the solution is not creating a bigger preview - the solution is using
If you hover over a hyperlink, a small window appears that will show the preview - and hide a lot of text. This will break the flow while reading. I constantly find myself maneuvering the mouse to avoid stepping on these 'virtual land-mines'.
Some sites use this only for external links - and some for internal links as well. But all the links are marked in the same way - making it harder for me(and others) to navigate through this 'mine field'.
Added 20K Download
Users hate it
Maybe hate is a strong word - but when Darren Rowse at Problogger asked the visitors about their opinion about Snap, the majority said "No, thanks". This caused Darren to remove the script from his site.
for-in loops - I don't know how they will hold up if your site uses Prototype.
Disable Snap Globally
Despite all these negative things, I liked this thing about Snap. There is an option to deactivate the script globally. Just follow the 'Disable Snap Link' and snap will be disabled for all sites. More details about the Disable feature.