Just finished playing the PC version. What a schizophrenic game. When it is at its best, it's totally awesome display of smart level design and wild acrobatics that actually works really well with the control scheme (which I didn't have a problem with). My beef with it was that whenever the game devolved into tight quarters jumping puzzles or the beyond terrible forced combat segments, it really, really falls apart. At least the game is super short so by the time you fully realize the game's glaring deficiencies you're at a point where you can just finish up the story mode and be done with it. Really rough around the edges product with issues DICE should have flagged early on as "not working/not fun" and tossed out to add more fun into the game instead.
Time trials are definitely better than the story mode, but I had a hard time getting into them. Reminded me a lot of playing Trackmania, of all things-the combination of understanding every nook and cranny of the level, knowing exact angles and velocities at particular points, etc. I just didn't find the time trials to really be worth grinding and improving on since there wasn't any sort of real community leaderboard/friends thing on the PC. I think this is once case where being able to pull info from Xbox Live's friendlist really makes a difference. Sure, I could get three stars at this, but I could also get gold medals on Trackmania maps and instantly be compared with people from GAF, my home state/country/world depending on my score. So the time trials just didn't scratch the competitive itch where I think they are best demonstrated. No slight against them in any way, other than I thought that some of them re-used the same tricks over and over and that at times the PC control scheme was a bit cumbersome for performing the precise timing combos. No editor on the PC is just painful, but at the same time I doubt there were enough people buying it on the platform to make it worth it.
A side note-I'm having a terrible time adjusting to non-FPS console games when I play them versus my usual diet of big open-ended strategy games, RTS mulitplayer, and simulation games. I just can't get into them at all anymore, and it sort of sucks because not everything on consoles is made for poop-for-brains people.