A few months out now, and I still find the 4S to be a worthy upgrade choice. I use Siri multiple times a day, and it continues to surprise and amaze me. I'm looking forward to future enhancements to it to make it even more capable.

One of my tests tonight after seeing a movie was to try and find some place that served cake. It did expose a limit in the system, but handled it well "I need cake at a place open after 10pm". Siri searched for places that served cake, returning 20 results nearby. It also apologized for not being able to determine opening and closing times.

The reminders still remain my primary use of Siri. "Remind me about this at X time" or "Remind me about that other thing when I get home" has been immensely useful. It's a situation where everything was possible before, but the method now is much improved, to the point it becomes second nature to just use it. Down to the little details such as the reminder alert offering to dial if I asked it to remind me to call someone.