I'm no wimp myself, but I still appreciate being able to sling my trimmer around like it's nothing. I trim at a pretty brisk pace and it's just nice to have such a light unit that's still capable, espeicially when you get to be my age, lol.
My Shindaiwa M2500 is around 13 pounds and I never thought it was heavy until I got my 323. So yeah, an 11 pound trimmer isn't exactly heavy. I think my M240 and M241 are a bit lighter than my 2500, but the 241 got damaged and needs work and the 240 is a bit tired now. I've also got a Stihl FS110 with the bike handlebar for the heavier trimming and brush.