What to add that hasn't been said? It's a good game. It's very enjoyable to guess where the targets are based on their surroundings. Feels great to get the kill. It's also fun to occasionally see their assassins in the bounty window. Nice map for this too.
The other hunters are really hard to beat. I'd like a difficulty setting for fewer or slower opponents :) Also maybe a count of how many targets remaining?
Also, sometimes the gore from previous bounties becomes the new landmark. Priceless.