Lots of folks believe that you simply don't need them. I feel differently. If you like them, and they work and they are durable, go for it. I have them on a Wilson customized Colt Combat Elite and carried it for many years before going to my CQB. I never had a single problem, even when I dropped it down a 500 ft hill while rapelling down a cliff. Sight never moved but the beavertail folded up on me. I have a lanyard now.
I have never believed that a defensive pistol needed night sights front and back. BO-MAR rear and Heinie tritium front is perfect for my use. They are certainly highly thought of. Bar-dot tubes can be done on most any sight.
The leaf cut mounting is a very safe and reliable cut for adjustable sights. You can see these on Les Baer, Kimber and STI. Many custom shops like to do it, too.
If you have a Kimber or STI then Heinie makes fixed sights that will fit in the dovetail. Kinda cool and they work great.