I have never had any problems with mine, it seems really solid. I have only put a few hundred rounds through it but I have had no malfunctions and the gun shoots accurately. It was purchased used.
I think that Taurus sells a lot of guns, and occasionally one gets through quality control that shouldn't have and then a frustrated person rants on the internet. For every one person that has a problem there are a hundred or a thousand people content enough to not go rant about it on the internet.
If you do get one and something seems to be wrong with it, their guns carry a warranty for the life of the gun. You get it sent to Florida and they say they will fix it. I think that the odds are good that it will function reliably.