The good, even the worst ones ussually have a decent trigger, and that trigger makes it easy for new shooters to start grouping well and feel like they're improving.
The huge aftermarket is a big plus, you can make your dream pistol, assuming you don't just find it in someone's cataloge.
The 45, despite all the BS is a big baby in 45, a very gentle rolling gun in a steel frame.
The down side?
Unless you've got good sized mits, you have to roll the gun around in your hand to reach mag and slide release.
Up untill the 80s the colt made guns where frankly crap. And i've owned a few and quickly sold/traded them off to suckers who had to have a prancing pony. You had to work on em if you wanted them to feed anything other then 230 hardball, and even then, they had so many sharp edges trying to shoot them fast out of the box was an exercise in blood donation. My series 70 Combat elite was frankly pretty junk. Colt single handedly supplied the market that allowed Springfield and then Kimber to take off, and they fueled the massive popularity increase in the last 20 years, suddenly you could get a great gun that didin't need a huge investment in smith work to make it accurate and reliable.
I might carry a 1911 if i had CCW in Canada, but given a choice i'd take an XD/M&P/Glock as a carry/duty gun. Simpler, more reliable, more tolerant of abuse and easier on both the pocket book and the hips.