It is up to the individual to make sure that their example of whatever brand,make, or model they choose is reliable at all times.
The PT1911 has shown to be such a gun.
http://www.thehighroad.org/showthread.php?t=505509
There are many other examples that can be brought forth where this is the case. Many,many more.
However to say that all of a brand,make, and model are always reliable and have no problems is unreal and false. Matters not what the brand.
The magazines, internet,tactical, and police journals are full of documented cases where guns break, parts wear out, and QC lets one slip by.
Recent firearms recalls by a number of makers underscores that.
A lot of work has to go into assuring the indivdual's gun is reliable. Ammo brand,type, batch number, shooter techniques, gun break in, and a lot of other factors go into all this.
1911s as a whole have their good points and fallible ones as well. That's true for any type of pistol.
The good points and cons have been documented down through history and will continue to.
So it more important that the individual's gun, what ever make, or brand, be ready to go in time of need, more so than broad brush stroking a whole brand and type.
Any of the 1911 brands break and can fail. Seen it first hand and as documented truth. Doesn't mean that they should not be trusted. Just that the guns should be looked after closely and humans, being part of the fallible equation do their share of falling down on this as well. Happens to us all at one time or another.
I've been to many IDPA shoots where the highly prized top of the line 1911s choked,came apart ( it only takes one part), or went down for one or more reasons. In many cases it was one 1911 after another on the line this happened to. The record for me watching the others were 5 in a row.
Does that mean the 1911s are trash. No. Should One stay completely away from them totally. No.
However one has to be aware of these things and take them in stride.
Does this mean that traditional DA/SA autos are superior? No. They have their foibles as well.
All mechanical contrivances have wear and tear on them, wear out, and have parts break or have parts that need replacement. Guns are tools and mechanical contrivances. They have no magical out of the box abilities though that's what some expect, but should not.
All guns need a break in period of some kind. That's part and parcel of the whole pistol package.
If you have a 1911 of any brand, make, or model, then fine. Just keep up on it's maintenance and it'll serve you well.