It took me a good 3 hours to get through on co-op.
But that aside i didn't really like it all that much, it felt kinda lacking to be (excuse the pun) quite frank.
The characters had me laughing all the way through as Frank and Chuck seem to be at each others throats.
Gameplay is the same as it always is and was with weapons from DR1 returning such as the katana and scythe 
Some new combo cards appear, but i'm kinda bummed about how some combo cards from DR2 don't make a comeback.
Also you can't import your DR2 character and instead is given a lvl 40.   

And that is that.
Overall i thought it was "Faaaantatstic"
Also you can share photos over co-op. Hilarity ensuses

It is a waste of money.  If it were 400 points, I'd say MAYBE.  But there is no story advancement to speak of.  The big twist is something EVERYONE saw coming a mile away.  They took out some of my favorite weapons (Flaming Boxing Gloves, Defiler, Spiked Bat). 
Ultimately, it will leave you wondering why you paid 10 dollars for an epilogue that DOES NOT END THE STORY! 
Since the download does not enhance the core game I'd say just play dead rising 2.  Since you'd end up back on it in 3 hours anyway.  And if you don't have it, then buy it.  DR2 goes for 20 dollars used (cheaper on-line)  Just splurge and spend the extra 10 bucks and get a game with 20 times the game-play.

I just finished it and, yeah, it's not that great. Definitely not worth 800 points. Case Zero is much better and it costs half as much.

Sounds disappointing I would have thought you get some sort of bonus for playing Case Zero and Dead Rising 2. The price point turns me off along with the rather short length, still I would have picked it up at 400 pts.

I've been enjoying it but it depends on how much money you have and the relative cost. Case West is 1/10 of the cost of the full game when it came out, so I'm not that bothered by the length. Between playing it solo and playing it online with randoms or with friends I could see it providing a fair bit of entertainment. Also if you go for the achievements, it'll take rather longer still. There are only 3 cases in the whole game though, so if it's a "one and done" playthrough you're after it's not for you.
Shame about the ending, but then again we can be assured Dead Rising 3. The interplay between Frank and Chuck is pretty great as well.

Bought it earlier today and finished up solo in about 3 hours as well. For 800 points, I personally was disappointed in it. I was expecting it to be much more fleshed out. I think with Case Zero it was different as that was a brand new Dead Rising experience. Case West, gameplay wise I wish they had done something new. As it stands, it is exactly the same with really only a few new combo weapons, though to their credit they are pretty awesome. The return of the camera mechanic isn't anywhere near the same was it was in Dead Rising 1, so that was another missed opportunity.  Also was it just me, or did the security personnel enemies really disrupt the flow of the game?
 
If you're coming to it for the story, like I was, you may want to wait and see if it drops in price as it didn't expand the story that much. If you're the kind who could care less about the story and just wants to go around killing zombies with a friend, it might be worth it.

Pretty fun. One of the achievements (Handy Man) doesn't work for me. Which kind of sucks, was going to add an S rank to my small collection

Is there a time limit

It feels like a missed opportunity. I loved Case Zero and got the best ending in DR2, but the focus on gunplay and the drab, repetitive setting really ruined a lot of it for me. I'm going to critical path it just for the story, but apparently that's pretty lacking too.