The problem with this poll is that it isnt subjective. It is not a $60 dollar game for me at all. My usual standard is I need more than 1 hour a gameplay for 1 dollar in price for it to at least qualify as a good buy.
You have more than that in hours in this game, but there are a LOT of hours that are just farming weapons, not really anything interesting playwise (this games biggest downfall, really.) It does not mean it isnt a good game, just doesn't qualify as a good buy at $60.
Now at $20 it is a great buy. When I bought it used at gamestop, I paid $14 I think. For that price it is excellent.
Interested in boosting:
GRAW, GRAW2, Halo 3, Halo: ODST, Prey, Army of Two, Contra