With concreters I've used, there hasn't been such thing as cheap and good quality. You definitely get what you pay for.
My mother-in-law used a cheapo concreter for her driveway, after 12 months it's already got cracks, water flows away from drains and you need to wear sunnies when out front as the slightest sunlight turns it into a beacon I reckon you could see from space.
Call a few different places, have them show you photos of previous jobs (if possible) and do your research.
