Push Lawn Mower Aerator Scarifier Lawnmower

I was just wondering if anyone has experiance with a manual push Aerator.

http://www.ebay.co.uk/itm/400572991019?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

I have a electric scarifier so this will be only used as a Aerator. I have owed a round push one before (single set of wheels and handle) but found it didn't go into the soil  to well  

this is the one 

http://www.ebay.co.uk/itm/Lawn-Care-Grass-Blower-Scarifier-Moss-Rake-/231053929826?pt=AU_Building_Materials&hash=item35cbe32d62

I've also had a manual core plunge like this one put it made quite a mess of the lawn so I tiped it 

like this one 

http://www.ebay.co.uk/itm/Handy-Scarifier-Hollow-Tine-Lawn-Aerator-Sprung-Moss-Thatch-Remover-/231047082096?pt=UK_Home_Garden_GardenPowerTools_CA&hash=item35cb7ab070

But mine didn't have the springs

what do you think 

James