I keep some notes of my prints which includes the comments Slic3r puts at the top of the gcode.

InMoov RotWormV5 (right bicep)
Prusa Air 2 - 1.75 - InMoov Worm 30%, 1per, .3mm, 5mm brim, support
Cooling Disabled (Black 1.75mm ABS from MC)

Estimated Print Time: 1h:29m
Actual Print Time:  2h:35m:37s
Filament required:  8559.4mm (19.4cm3)

; generated by Slic3r 1.0.0RC2 on 2014-03-06 at 19:53:10

; layer_height = 0.3
; perimeters = 1
; top_solid_layers = 3
; bottom_solid_layers = 3
; fill_density = 1
; perimeter_speed = 30
; infill_speed = 60
; travel_speed = 130
; nozzle_diameter = 0.35
; filament_diameter = 1.70
; extrusion_multiplier = 1
; perimeters extrusion width = 0.35mm
; infill extrusion width = 0.37mm
; solid infill extrusion width = 0.37mm
; top infill extrusion width = 0.37mm
; support material extrusion width = 0.35mm

G21 ; set units to millimeters
M107
M190 S120 ; wait for bed temperature to be reached
M104 S220 ; set temperature

InMoov PivWormHiggsV2 (right shoulder) (mirrored)
Prusa Air 2 InMoov Gears 100%, 0.3mm, 5mm brim autodetect support
Cooling Disabled (natural ABS)

Estimated Print Time: 43m
Actual Print Time: h:m:s
Filament used: 2670.9mm (17.6cm3)

; generated by Slic3r 1.0.0RC2 on 2014-02-22 at 14:02:34

; layer_height = 0.3
; perimeters = 1
; top_solid_layers = 3
; bottom_solid_layers = 3
; fill_density = 1
; perimeter_speed = 20
; infill_speed = 20
; travel_speed = 130
; nozzle_diameter = 0.5
; filament_diameter = 2.9
; extrusion_multiplier = 1
; perimeters extrusion width = 0.60mm
; infill extrusion width = 1.20mm
; solid infill extrusion width = 1.20mm
; top infill extrusion width = 0.60mm
; first layer extrusion width = 0.80mm

G21 ; set units to millimeters
M190 S120 ; wait for bed temperature to be reached
M104 S230 ; set temperature