I've been using Saft since 11/04 and can recommend it for its range of features. Personal favorites:
1. ability to assign shortcuts for URL's (e.g. I can type "vt" in the address field, hit return and Safari goes to versiontracker.com)
2. ability to quickly save bookmarks directly in any Bookmark Folder, including folders in the tab bar. See SaveBookmarks.jpg attached
3. restore set of opened websites from a previous session in Safari
The above just scratch the surface of the complete Saft feature set.
The only issues are when Apple releases an update to Safari most Saft users are left grumbling for a day or so until its updated. Sort of like taking coffee away from some people in the morning.
Usually, the developer is very quick to release updates within a day or two of a new Safari release, so the twitching from the withdrawals are short-lived.
Lee.