I'm looking to "retire" an older manual aerator...and possibly replace it with something that won't be as likely to 'retire' me prematurely!! In the past, I've really liked the durability of Classen. I've had a 60" pull behind/ 3-pt unit; and a Lesco/Classen split-drive...that just keep going...and going...and going.... So, thus...I've really had my eye on the apparant ease and efficiency of the newer Classen 'stand on' units: the " Stand Aer SA-25's ". http://littlewonder.com/cl-aerators_std_aer.asp Seems to me that it'd be a great complement to the pull-behinds; especially on my sites where there's a number of 'obstacles' that the pull-behind can't always maneuver around efficiently. Any of you have any first-hand experience you can share about them ???