Some of the Taurus's have a real problem with the safety. If you touch the trigger just a little bit and put the safety on the gun will still fire. Try it. On mine it only takes a 1/8 or an inch.
It takes more than 1/8th inch of travel on any Taurus MilleniumPro or 24/7 to engage get past the safety when you engage it. Highly unlikely someone would do that. The safety is a bar that blocks the trigger's rearward movement. If you move it 1/4 to 1/2" back you can engage the bar in front of the trigger...so the safety is "on" but the trigger can still fire the gun. Of course, you should never be pulling the trigger when engaging the safety and the trigger will sit back 1/2 and inch so it is pretty obvious something is wrong.
I have a Millenium Pro. It is a good shooting gun...very accurate and a real nice handling package. I really like the crisp feel of the trigger and the second strike capability. Unfortunately, it isn't machined to the same high standards as other companies, like S&W or Sig. You can see tool marks and bits of metal curl inside the slide. These are indications of poor quality control when machining...tool speeds wrong...cutters not sharpened often enough...cutter overtravel...etc.
I have a couple long term concerns with it too.
First, the barrel pivots and stops against the takedown pin. I have heard that +P loads can eventually break the pin. I'm more concerned with how the pin is retained. It goes into an aluminum assembly that houses all the workings and is molded into the plastic body. I can see wear indications on one side of the hole and I suspect it will eventually wear out. When that happens you would have to replace the entire lower section...since it is molded together.
In a Sig, or S&W, for example, the barrel pivots and stops against a hardened metal block this block will last for tens of thousands of rounds.
Second, the slide stops against the same aluminum assembly...at the front. In mine, after maybe 600 rounds there is obvious peening on the front of that aluminum assembly complete with some loose aluminum shavings. I"m not sure if this could eventually cause problems but it looks unsightly.
On my polymer S&W M&P the slide stops against a polymer bumper that is in front of the metal assembly. The polymer cushions the impact and the plastic will probably last as long as anything else in the gun.
For most people these things might never be issues. No one sees the inside of your gun except you when you clean it. Most people don't put more than a couple hundred rounds through their guns in their lifetimes. For those type of people the Taurus makes a good inexpensive pistol. If on the other hand, you are like me, and might put thousands of rounds through your pistols a year...or worse, a month, you might want to look elsewhere.
P.S.
My experience is with the Millenium Pro but the 24/7 I looked at, at the gun store, looked like the same basic design with a different grip.