Tradies love to take there time and do things backwards on a hourly rate, but if you watch over them allday they sometimes pullfinger, if there to slow don't hire them again.
I get most my work done on an hourly rate
I find with fixed prices they quote way to much and they love to say thats an extra, and then they slug you for more
whereas if there on an hourly rate and you want to make an alteration then there is no problem
It does depend on what your getting done.
here is a quote $15,200 and $14,600 to install a kitchen , I shopped around and got a kitchen for $2k and installed it myself, my finished kitchen has 2 pak doors and a marble lookalike top, both quotes were flat white doors but did have similer top.
painting, quoted $10k, I hired a guy and supplied the paint $1800 total.
bathroom quote $10k shopped around and got everything for $1200 and got a mate to help install it at no charge, well maybe a few beers.
end result top job done, outlay $4k vs quotes $35k