No - I thought/hoped I would be coming from a 3GS but tbh, apart from the screen & camera it's not much of an improvement considering OS4 runs just as smoothly on the 3GS. Unfortunately for me, I sold my 3GS but am returning my iPhone 4 and buying a Galaxy S instead. I was lucky enough to have one to try for a few days and was totally blown away by the simplicity of the phone. I am not saying the iPhone 4 is not simple to use, it is - having come from the other incarnations over the last 3 years but to be able to do things on the Galaxy that I can't do on the iPhone is a delight. Yah, I know I can jailbreak it, but really - why bother to buy a $500 phone if it doesn't do all you need to start with and then end up jail breaking it? Makes no sense to me.
Ok here are some examples - bear with me:
iPhone 4 on 02 (UK) Contract cost me £35 a month for 18months with 300mins, unlimited texts/500mb data + £279 up front for the phone.
TOTAL COST: £909
Galaxy S on Tesco (02) Contract cost me £30 a month for 2 years with 750mins, unlimited texts/500mb data + nothing up front for the phone. Yes, nothing.
TOTAL COST: £720
That's almost £200 cheaper over 2 years.
Likes for the iPhone:
Well built, no denying that.
Flash, useful in some situations
Seamless integration with my MobileMe a/c, itunes, iMac etc
Speed
Dislikes for the iPhone:
No bluetooth sharing. I mean come on, I have an iMac and I can't bluetooth a file to it? Crazy.
Signal - dropped calls on at least 2 occasions in as many days. Yes I have a bumper but wth should I have something round my phone which looks ugly to help a phone which I would have paid £900 for over 18mths make a call?
Totally boring OS - they upgrade the phone significantly, upgrade the software, and they can't make any changes to it? Like personalised home screens, widgets etc.
Weight - dam it's heavy, certainly heavier than my 3GS
Fragile - sooner or later, case or no case it's going to break, well for me maybe. Whereas I felt more comfortable putting the 3GS down on a table, I feel like I have to put the 4 down on a cushion
Likes for the Galaxy S
Screen - in spite of the glorious 'retina' display on the iPhone (which is fantastic btw), the screen is just so much sharper and more coloured than the iPhone. Put them side by side and compare for yourself. Oh and there's the 4" screen, on paper 0.5" doesn't seem much more but Samsung have managed to make it look even bigger by stretching it out to edge almost. Videos look better as well in the correct ratio.
Sound - tiny speaker on the back but SO much louder than the iPhone including speaker calls
Weight - ok it's plastic - no getting away from that. But it feels much better in the hand despite the size and weighs about 20grams less. Slips into pocket nicely, don't know it's there
Android - nowhere near as comprehensive as the App store granted, but nice apps none the less and plethora of customisable widgets, which look great on that display. Loads of other options, great social widget, address book integration, voice guided (free installed on the phone) sat nav, true multi-tasking, bluetooth sharing (paired with my iMac instantly), great UI
Dislikes for the Galaxy S
Looks cheap - but hey, with more features and a £200 saving I can live with that
No flash - major omission from Samsung here, but I rarely take pics at night so again no loss
No push mail - this I will miss as I like this on the iPhone but I can check mail at work if needed.
Already I can hear the click click of the users typing to refute my claims, tell me to go buy Galaxy and never darken there forum again blah blah blah - but it's a Forum, where people are allowed to express their opinions, give advice, take advice, and generally get along with other users in a nice civilised fashion lol.
I'm not asking for anyone to agree with the above or disagree, but the original poster asked if we were as happy with iPhone 4 as we thought we would be - I am not so I have posted.
Have fun!