This phone number sets up an immediate choke point for customers, as you can't use it at all unless you're willing to provide personal details. When you call Experian, you're brought to a menu where you can choose whether you're looking for help with your personal credit account or your business account.
Here, I opted for assistance with a personal account, and immediately ran into the choke point. The system asked me to establish my identity by entering my Social Security number. Given the nature of this call, I was unwilling to do that, but had no way to get around it. With no real option to proceed, I hung up at that point.
Given the nature of what Experian does, I prefer that there's a choke point here. This isn't a number where you want people to be wasting time, given that people who call this number are in need of assistance with their credit reports. When someone calls this number, it's usually a stressful situation because they've found something wrong with their credit report and need to get it checked out.
Additionally, the people who call this number are trusting the people on the other end of the line with incredibly sensitive information. A credit report needs to have the utmost protection in order to prevent it falling into the wrong hands, and Experian's system does a good job keeping this information as protected as possible.
There isn't going to be much reason for someone to call this number unless they need specific help with their credit report. With some companies, you might have a reason to call for information, but there's really no way to call Experian for information unless it's about your own credit report. As such, even if you're trying to make a call for basic information, it makes complete sense to keep this information well protected.
Obviously, I cannot give a complete picture of what calling this number is like with this choke point in place. What I can say is that it seems that Experian takes data security seriously and protects the information of everyone's credit history as best as it can. There's no way to get to someone without entering your personal information, and trying to trick the system by stalling out doesn't do you any good. You cannot get to a representative without entering your genuine information.
I cannot say for sure what the customer service is like from Experian, but given how seriously it takes customer security, I would feel comfortable using this number if I had a question with my credit report.