I wouldn't own a Glock over any other pistol in particular but I did own one at one time (along with about 15 or 20 other different automatics). I found it to be quite practical, provided one was happy with whatever cartridge it was chambered for. But pistols are highly personal things, I suppose, and I can see someone not caring for its peculular features, same as most any other pistol.
The claim that it wouldn't stand up to extended serious use, I'd have to say that is contrary to other claims. However, that's not one of my requirements in a handgun anyway. I also wouldn't worry about it degrading in the sun, unless you're expecting to leave it lying outside on the deck for several days. By the way, go by the local playground and see what kind of shape the plastic equipment is in.
Shoot low, sheriff. They're riding Shetlands!
Underneath the starry flag, civilize 'em with a Krag,
and return us to our own beloved homes!
Buy War Bonds.