I own a G36 and frequently carry it:
PROS:
> Very easily cancelable
> 6+1 of 200 grain Golden Saber .45 ACP -- plenty for personal defense
> Traditional Glock reliability, durability, and quality -- carry it forever with no concerns re corrosion, malfunctions, excessive ware, or marginal reliability
CONS:
> Traditional Glock accuracy -- satisfactory, but not a "tack driver" like the remainder of my handguns
> Traditional Glock striker/trigger feel -- if you like one, you'll like them all
> 3.78 inch barrel length -- adequate, but I prefer the full-size 1911A1's five-inch barrel for increased velocity
> "Safe Action" system -- fine for me, since I am revolver-oriented, but no real external safety