I Originally purchased the BLACK+DECKER KG900-XE but had to give it to my brother because that thing was so heavy and fat I couldn't hold it up, especially if it was spinning because I wouldn't have been able to control it.
This Bosch is not only lighter but the green part that you hold with your hand is much thinner compared to the Black and Decker. So if you have tiny hands like me you'll have more control over it and that's really important, because once it touches a surface you need to hold on securely so the force doesn't push you around.
I highly recommend this one for anyone but especially people with not as much strength in there hands.
I have sharpens the blades on my ride on lawn mower, cut through metal hooks, sharpened my weed chopper and bought some new disks to try a few more things when I feel up to it.