After my iPhone 4 died I really debated whether to pick up a replacement 4 or go for the 4S. In the end I plumped for the 32GB 4S in black, I haven't been blown away or disappointed.

First off the design of the 4/S is timeless and in my opinion the best looking smartphone out there, sure it's a bit slippery and feels odd to hold at first but you can't cover this up with a case - its mean't to be used. So switching over to the 4S there were do surprises given it's the same design.

The first thing I checked was the dreaded antenna issue - guess what, its gone. Well for me anyway, I can grip to my hearts content and I experienced no dropped calls or loss in signal.

Next up SIRI, which I have found to be great in my car journey to work for reminding me to do stuff when I get to my destination. I also use it for setting timers at home when cooking etc but to be honest that's about it. If you are using more than one calendar and a whole list of reminders it doesn't work 100% as it doesn't know which one to put it against - i'm sure Apple will address this in future updates. So SIRI is a nice to have but not a game changer for me.

The camera is the one area that did make me stand up and notice, it's a bit step up from the 4 and the biggest improvement I saw was in low light around the house for indoor shots. It is more responsive (thanks to the new A5 processor being used) and takes amazing pictures.

Overall the experience is snappier thanks to the boost in processor and memory, with iOS 5 you do feel this improvement.

So coming from a 4, am I glad I upgraded? Well when selling my 4 and going up to the 4S it didn't cost me a great deal extra so in that respect i'm glad I did but if you have a working 4 I would hold off until the next revision given it should be a redesign and should be with us within in the next 8 months.