After being an avid fan of the previous iPhone I got really excited about the idea of a brand new phone and obviously got sucked in by all the buzz and speculation you get around the release.
First off starting off with the build of the phone it has the glass front much like on the previous generation iPhone but on this one you also have a glass back some people worry about scratching or cracking but I have had an iPhone 4 for around 18 months now and have suffered no scratches or damage to the glass. Around the side of the phone you have a metal band which also acts as the phones antenna and you have +/- control buttons and on the top of the phone a 3.5mm headphone jack and the power on off button then the bottom of the phone has your typical Apple connection slot where you plug it in to update on the computer or charge with the lead provided.
I don't have many faults for the phone it's self but as it's provided when buying I will mention that the headphones provided are prone to breaking the sound quality is above average compared to the headphones provided with other similar phones but the wires connecting to the headphone it's self seems to be very fragile. I contacted Apple when mine broke though and they kindly replaced them and I received a new pair within days in the post.
Now to the actual phone the first thing I will mention is I tend to have a dislike towards touch screen as sometimes the actual touch of the finger to the screen doesn't synch up correctly which was obviously something I had to consider when taking the dive for an iPhone. Fortunately the touch screen works perfect it's extremely responsive and easy to navigate.
The display it's self is the much talked about retina display and it's pretty phenomenal the quality of everything when looking at it on the screen. You can use the function to pinch in or out on the screen to zoom in and out which further shows the great functionality of the touch screen and even when zooming right in you still get the same great quality picture on the display.
The camera is another standout feature on the phone the main camera is 5 mega-pixel and has a flash and then there's a slightly lower quality front facing camera. The front facing camera is mainly for the use of face time which is a free video calling which can be done with other iPhone users and Apple computer users. I have only used this twice but over a long distance call and the sound and video were both extremely clear it would especially be useful for keeping contact from across the world because of the free cost of using it over wi-fi. The front facing camera takes crystal clear photos and the flash works extremely well without adding blur or a glow to the photo. I have not taken advantage of the HD video recording as much as I would of liked too but the sound and clarity of the videos for a camera on a mobile phone are extremely impressive.
As for power the iPhone 4 has the powerful Apple A4 processor because of this you find that the apps all work seamlessly and open and load very quickly. You can also have a number of apps running at once and just double click the home button and switch between them which is a favourite feature of mine as I find this very useful especially if you were for example taking information from the web to put into an e-mail.
The iTunes app store is the biggest of any of the current smart phones available on the market now with hundreds of millions of apps available for almost anything you can possibly imagine.
Battery life is something that varies I find that if I fully charge the phone and use it all day but using the internet with 3G that the batter will run down within about 6-8 hours but if I am using the phone mainly indoors with wi-fi that could extend to around 8-10 hours. Standby time is something I haven't really tracked but I know there have been times the phone has been been used very briefly and the battery hasn't run down for 2 days.

This is also posted on Ciao under the same username AwesomeForrest