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I'm thinking of buying, but still on the fence. 

Other than not liking how effortless all the achievements are, this is the best arcade game I've downloaded in a long time.
 
I'll definitely be playing a lot of it.

My two cents, if you liked what you played of the demo, get the full game, besides the overly easy achievements there's not much wrong with repeating the formula with small changes. And $10 isn't that much :P It may not be as good value as, say, Super Meat Boy (which I think has gone back up to 1200MP though) , but it's still awesome.

I bought it, S Ranked it, and played it for two more nights. Haven't touched it today, but it's good enough that you should buy it. Like Geometry Wars, it's good to go back to at any time. 

I think it's an amazing game but nowhere near as good as some people say, this is not GOTY 2010 and people who say that are crazy in my opinion. 

It's a lot of fun! The rankings a great motivator to keep playing, as they are based on your percentile on the leaderboards. So this morning when  I saw my S ranking (top 5%) on the Championship II map was knocked down to a lowly A ranking (top 10%) I was inspired to go back and play for like 30-40 minutes to keep my scores relevant.
 
I can see myself coming back pretty frequently. Its a wonderful palate cleanser after hunting Borgia Flags in AC:B.

While I am not good at the game at all, I do love playing it. As was mentioned before the rankings are fun to check out, and this is definitely a game that I will come back to time and time again. Easily worth the $10.

I don't remember Pac-Man C.E. having hard achievements so I don't understand the complaint about easy trophies here. I'm very happy with the game. I'm not sure I like it more than C.E. but I'm having a lot of fun.

I fucking need to buy it after playing the Trial.

Too easy achievements and GOD DAMN I HATE THE D-PAD ON THE 360 CONTROLLER.  
 
I forgot to mention that it's a really fun game.

Got it on a whim and have been LOVING it. The music, the visuals(!) and all the mazes keep me coming back. I'm not particularly stellar at it, but I managed to get the achievements on my first session and have been kinda playing it everyday for at least a few rounds. It's a great game to just pick up and play, and lately I've been filling my XBLA with stuff like that.

it is a no brainer. just like geometry wars 2. 
 
the only semi bad thing i can say about it is the achievements are really easy, you'll S-rank it for sure. 
 
the real thing to look at is your ranking in the game, when you dont play people are besting your scores and you need to jump back in to reclaim your A rank

I was never a fan of the original, mostly because I wasn't very good and got frustrated.  Picked this up in the sale yesterday and played until 4am.  I still have Batman: AA sitting here in shrinkwrap.
 
I'm still not great at it but I had a blast.

This is a tick under Super Meat Boy as my favorite downloadable game of the year

Bought it a couple of hours ago. It's insanely addictive. I Imagine you could make it even better if pac-man could drift! It's totally possible to do it in LBP2. You'd need a different level layout of course.

The game is all kinds of awesome. Been scoorechasing Supermarius for over a week now and that alone is tons of fun.

I like it so much that I bought it on both the PS3 and the 360.  I kind of wish there was a PSP version as well so I could take it on the go with me.