Hi folks,
I have just aquired my first L lens

(a second hand 28-70) and would be grateful of some feedback on what people's thoughts are on the IQ. Is it similar to what I could expect from a good 24-70?
Viewing in PS @ 100% they look pretty good to me but I have no experience of L lenses.
I have attached three pics of some different subjects. One is my adorable 5 month old niece
Thanks all for taking the time to assist.
Paul