A tale of two demos

THIS weekend the PlayStation Network has demonstrated quite effectively how game demos should - and should not - be done correctly.
The first to mention is the hugely-anticipated Killzone 2 demo. After downloading it and booting it up, negotiating the start menus (the slight shakey camera-style is a little off-putting), the game started - and absolutely blew me away.
Fantastic graphics, smooth and fluid gameplay, intelligent AI (where the baddies actually run out of the way and hide if you throw a grenade at them) - it was all I had wished and waited for.
Add to that the fact that you can choose different configurations of controls to suit your play - in ways that actually suit different gamers, not just ones that are put in their because they think they should - this demo will definitely shift copies of Killzone 2, including the one I buy.
But, on the other side of the coin, comes - Resident Evil 5.
Again, this was highly anticipated, but once I had downloaded it, I went to the options screen - and it all froze.
I restarted my PS3, booted the demo up again, started the game straight away, got through the first cut scene - and it locked up my console again!
I reset it and deleted the demo! Later that day I went round to a friend's house on whose console it actually worked, to find that, even in these advanced times, you still can't run and shoot at the same time!
Yes, the graphics are impressive, but hasn't gameplayed moved on a bit?
So, thanks for the demos - it has definitely made my mind up on what I will and won't be buying!