Just got back from the shops and had a good long play with it (white model).
I actually think it looks cheaper in real life than in the pics

Didn't really notice any brush effect whatsoever, which is a good thing in my books as it is plastic and not metal.
- Needless to say I hate white and didn't like the look of the mobile at all anyway regarding the design of the front (just the buttons)/back etc. however, I love the thin bezel
- It felt very nice to hold in the hand and surprisingly didn't feel as big as what you would think
- Felt very sturdy and well built
- Screen is stunning, super sharp and lovely colours, much prefer it to the X screen
- Very fast and smooth, however, for web browsing it wasn't anywhere near the speed of my S (using stock sense and quick ICS browser), the GS 3 was on wifi and mine was on a H data connection (about 2MB/s dll), I imagine this is just the unit that I was using though or the wifi connection. In fact, it took a while for HQ youtube videos to play, like 15+ secs to buffer, so most likely just a poor wifi connection.
- Hate touchwiz, don't like the launcher/colour scheme/modded apps at all, sense 4 is far more polished overall IMO
- Screen feels very nice to touch
What is your battery life like? Only seen a couple of people post their usage in the other thread and I personally didn't think it was anything special.......about 3 hours on screen time, automatic brightness and only about 10-15% left.......