you think rep g is an i mprovement on anything ?

Wow ! flashprint must be truly bloody awful !

I don't think I actually got to the point of running a print in rep g. After 3 hours it was still only half way through slicing a lefab shop articulated elephant.

Makerware desktop did it in about 3 minutes. Simplify3d does it in about 10 seconds.

Makerware is much better than rep g.

Simplify3d is worth the money, but you can get by perfectly well with makerware. I also prefer to edit the custom profiles in makerware in notepad - the program you can get that does it for you, just caused me extra hassle.

As far as your question goes, I've never bothered to measure filament and it's never been an issue.
But both makerware and s3d have clear places to put the measurements - I have no idea what repg does. and I'm happy to say I never will :-)