Shopped around to get a good price on lawn aeration, these guys were the cheapest. Only a couple of minor concerns.
1) they didn't give me a definite day they could come, so I had to have my yard debris free and leave my gate unlocked for about a week.
2) and while not entirely their fault per se, but my neighborhood has really poor drainage and they came the day after a heavy rain while my lawn was still saturated and the heavy aerator left some ruts in the soil and muddy tracks everywhere.
Overall, a fairly good job and would recommend them to others.