I have the Lesco dual drum aerator and like it a lot because it turns and can be steered. Most aerators work well.....I like a decent size tine on mine for a good plug. The biggest mistake i see people making with aeration in general is doing it on dry hard soil. You need to do it after a good rain or after irrigating for best results especially if the soil is clay or really compacted. I used a ryan lawnaire walk behind reciprocating (cam type) aerator once and it about shook me to death.