Just completed it- and I really, really enjoyed it. Not sure what the frustrations were that CVG mentioned- besides if you die you get sent to the last checkpoint which is usually about 30 seconds back so there's nothing to really get frustrated about. It says my total playing time was 2 hours 13 minutes- but that doesn't take into account the many, many times I fudged up. Still, for 1200 points it's a little pricey for about 4-5 hours. I also got most of the achievements in one play through.
It's pretty sublime though, control wise and graphically and the atmosphere is thicker than your average 'Made in Chelsea' fan. It also has some great music and a fun, if slightly corny story accompanying it. Might be worth waiting unless you're a fan of the old school Flashback type of platforming but I certainly enjoyed it. More like this please!
"Stop your putrid whining you dank tuft of rectal pubic hair."