I've played quite a lot of this game now since it came out here a few days ago, and my impressions are as follows -
Framerate can be inconsistent, both in-car and on foot. Generally though the in-car slowdown is the most annoying, as it can occur out of the blue when there's nothing happening on-screen that would lead to this slowdown. pfft! Framerate is best summed up like this - 60fps (I play in NTSC mode) will noticeable drops at times. GTA3/VC it is not, but it's there and it's easy to see when it is there.
Textures vary wildly, from above average to downright muddy and dull.
Car reflections are fake. The only thing it reflects with absolute accuracy are the street lights (the posts, actually), and like GT3 it looks to reflect the surrounding environment, but it doesn't. It looks effective though, and to the untrained eye it would be uber impressive, I'd imagine.
The character animation is awesome. When Hammond has been shot a few times, controlling him as he's limping around barely keeping hold of his gun is pretty cool.
However that's one gripe I have with the game - controls. They're very fiddly. Once you get the hang of it, it is a lot better, but getting the hang of it is the frustrating part.
With regards to any complaints about the camera not following fast enough, you need to let the analogue stick centre itself and instantly the camera will reset itself behind Hammond. You can't control it manually, so the best bet is to centre the stick with extreme regularity.
The cars are fun to drive around I must say, with a difference in speed/acceleration/handling noticeable in each. The collisions in the game are excellent, and it is very enjoyable trying to lose the cops or other gang members when you've had a few tyres shot out and the radiator is just about blown.
The voice acting IMO is top stuff. Doesn't come across as token Engrish ala Shenmue (which isn't that bad, but compared to Getaway it is), and the storyline is, to me, interesting and it's what keeps me going back to the game.
Difficulty is certainly up there, but it's more trial and error than anything else. Once you get certain enemy and vehicle patterns downpat, you'll fly through the missions....but only after failing a few times.
Pros - excellent storyline (for a videogame), very good voice acting, London looks good at times, combat is quite good. The auto-aiming feature is a breeze to handle, and manual aiming is tricky but gets better with practise. PAL version offers 50/60Hz, progressive scan and widescreen.
Cons - Can't select the view whilst driving. It's annoying because when you drive larger trucks you can only drive from an in-car perspective, but when you drive cars it's the outside or bust. No ability to look behind the car whilst driving, no ability to look left or right (which makes taking corners on busy roads at high speeds no more than leaps of faith), trial and error gameplay may put off a lot of people. And worst of all, the game can be downright cheap.
Take for example a vehicle mission where you are required to locate a repair van and run it off the road. OK then. So you locate the van and chase after it, and ram into it a few times. However the first few times I attempted this mission, I had a few collisions with other vehicles which made the chase longer than need be..but that's ok. Anyway I caught up to the van and ran it off the road....but then it came up saying I'd failed the mission because I didn't catch the van in time. What the hell?!??! Had to restart...ugh.
Same thing happened on a mission where I had to ram a police vehicle off the road...after a while the van just blew me off the road and my mission failed. Bugger that.
I'm currently on the last mission as Hammond, and so far I would say Getaway is a must-rent at the very least, but must-buy? Not quite. Still, it's better than I thought it to be.
Also any comparisons to Vice City are useless. The two games are worlds apart.