Just beaten this, thoughts below:
+Good graphics, I've always been a fan of the Chrome engine and this doesn't disappoint.
+Narration throughout is a really nice touch, helps build the atmosphere any story
+Interesting mechanics with flashbacks to replay sections, add in new pathways etc
+Brilliant performance, runs at rock solid 144fps in 1440p at higher than max settings. I know it is a slightly older game but even so, most games that look this good perform worse
+Generally good fun, doesn't take itself too seriously
-Perhaps a little bit too linear, although that's pretty much mandated by the narration elements
-Combat leaves a bit to be desired, most people just stand around waiting to be shot in the head and the duels are too easy on normal difficulty.
Overall I'd say this is good game and more accessible than the original.
I'm a bit late to the party but for future reference if anyone comes across this thread and wants an answer to the above questions, you can remove the borders by adding the following to Video.scr ( %USERPROFILE%\AppData\Local\techland\cojgunslinger\out\Settings )
ForcedHorzFov(110.000000)
DisableScreenBorder()
RenderViewportProportion(2560, 1440)
Obviously tweak above to match your resolution.