A good Le Pro is an excellent tip. The problem, as others have stated, is finding a good one. Fifteen years ago, I used nothing but Le Pro, that is, until I discovered Triangle.
The Triangle is a vastly superior tip to the Le Pro, even a good one. It holds chalk better, holds its shape as well as the best Le Pro, has better feel, and much better consistency. I don't go through as many as the cuemakers, but I have never had a bad Triangle tip--not one--so I certainly can't affirm anyone's view that Triangles are inconsistent.
In recent years I've gone to layered tips, but I still keep Triangles on a few shafts and still play with them regularly. Funny thing is, everytime I shoot with a Triangle, I begin to wonder the logic of paying 10-20x more for a layered tip ...