Grasshopper claims The AERA-vator™ aerates and loosens compacted soil in 1/4 the time and with 1/4 the labor it takes with walk-behind aerators. AERA-vator™ eliminates unsightly cores and deep-fractures hard, dry soil combinations within the root zone without irrigation, increasing water filtration by up to four times. PTO-driven tines vibrate in an oscillating motion to penetrate soil, while heavy-duty construction allows use on packed paths and areas containing small rocks and other obstructions that would damage other aerators. 

I have seen this unit and the tines and drum are made very heavy! These units are very easy for one person to hook up.