I prefer them over others, for several reasons, but mainly due to the fact that you can take one almost completely apart and put it back together, using just the tool that normally comes with them (or a couple of allen wrenches), and 99% of the time, replace any part without any gunsmithing needed,not that it's happened very often. They are very strong, I shot thousands of full power .357 rounds from one of my guns, and it was still in great shape. And they are more accurate than I ever have needed them to be, or I could ever be.
I'm on my 5th and sixth .357's now, I stupidly sold the 4 Model 15's I used to have over the years for money to buy PCs with, and last year bought a near mint stainless 715 that appeared to be unfired, in the box with 3 grips, a couple of front sight inserts, and a not so pretty, but really cheap blued Model 15. Both shoot great, and all together only cost a little over $500!
Now if I could just get the money together for a 44 mag...
There are lots of them on Gunbroker.com.