Caveat: Had to try for two days a S5 and G3, the S5 was for me pretty quickly out of the race because I had too many software preinstalled and you can not prove how the LG even the lower buttons.
For LG G3 32GB:
+ Small housing dimensions for the big screen
+ Removable battery
+ Memory card slot
+ WLAN reception (S5 and LG G3 side by side in the conservatory = S5 no reception to 1Balken-- G3 full WiFi reception)
+ Changeable allocation of lower operating buttons (longer / other positions, etc.)
+ Strong battery (lifts me two days)
+ 5 Android to come this week
+ Camera very good day.
- I have it constantly in my hand because I like it so.
The S5 would indeed come up on the current cashback action cheaper, but the gut feeling has to be right.
This is my personal opinion, I am aware that there are other priorities in other people and for this then for example the S5 the high-flyer.