If you want grass / weed barrier nails to be nailed into your irrigation pipes to create leakages all over and shoot up your water bill, if you want uneven surface under your grass and drainage to get screwed up, if you want uneven grass cutting, if you want grass seams not taped properly then go with these guys. If not, go find someone who actually knows how to do landscaping work. They don't even know the basics of landscaping. They will quote you low but you will end up spending lot more to fix the mess they will create and let alone dealing with all the nightmare.