I can not be bothered looking at a calendar, but it has probably been over a week now since I switched to Safari 5. Its release coincided with my formatting my MBP, and that always gives me the urge to change how I use my computer. Here are my impressions:

• Speaking as a consumer, extensions are excellent. Safari finally has a viable ad-blocking solution, and thus is finally a viable browser. I spent about an hour browsing the web prior to installing AdBlock and the level of obnoxiousness web ads have reached is astounding. Perhaps as a user of AdBlock I’m partly to blame for this. I think there’s a better solution. There are sites I place on the AdBlock whitelist. Good content, good ads - I have no problem supporting that.
  Some kind fellow has set up a Safari Extensions blog, which takes all comers. Until Apple gets their act together with a gallery of their own, this is incredibly useful.

• Stability is a huge plus. I’m coming from Firefox, which did not lack for add-ons and features, but which crashed regularly. I have had one crash since switching, and no prizes for guessing which plug-in was involved there.

• Tabs are still a pain. It is my own fault that I have too many of them open, but I’m not wild about Safari’s solution to the problem. Or anyone else’s, really. Firefox ends up scrolling through tabs. Chrome just keeps squashing the tabs together until it can squash them no further, and the tabs just disappear off the right of the window.
  The solution is clearly to not open so many damn tabs. I’d love to see something similar to MobileSafari’s take on ‘tabs’ in a desktop browser though.