Saft is a Safari browser plug-in that adds some much needed functionality to Apple's browser. I have heard of Saft ever since I switched to the Mac over 1 year ago. Until now, I had shied away from installing it as Saft can have compatibility problems when OS X is updated; but from what I hear, the Saft developers are always very quick to update the application soon after a revision to Safari is made public.
I finally broke down today and installed a demo version of Saft on my MacBook Pro. The key features that I am interested in are full screen mode, and the ability to save and re-open multiple browser tabs when re-launching safari. The full screen mode is particularly important to me as I like to read books online via O'Reilly's Safari bookshelf.
Unfortunately, the demo version of Saft is more irritating than any value that it brings. Saft forcefully displays a pop-up dialog box when Safari is launched, preventing Safari from being used until the user manually dismisses the dialog box -- extremely irritating. Instead of reminding me that I should upgrade my demo version, this dialog box reminds me that I must quickly and promptly remove this virus from my computer.
There is nothing wrong with displaying a credits dialog box, but it should be displayed briefly and quickly dismissed without user interaction. As it stands, Saft makes my browsing experience slower not faster.
If you are offering a free trial of your software, do so freely and do your best to provide users with the best customer experience possible. Give the trial a fixed time period when the product will stop working, and be confident in the value of your application to know that users will purchase it after they have a chance to experience its functionality. As it is, with Saft, I used its full screen feature only once, and I was bugged by the software at least 10 times before I finally gave up and uninstalled it. Instead of Saft bringing me value, it slowed me down - not really the experience the ISV wanted out of a free trial. It is too bad, because I really could have benefitted from some of the features available in Saft, but I won't give in to such poor tactics and purchase the final product.
Luckily, uninstalling Saft is quick and simple: move Saft in /Library/InputManagers to the Trash.