Reonomy is legit. I'm a commercial real estate broker in Los Angeles, and we use this software almost daily. The info is on point and makes you look like a champion to your clients. I highly recommend it.
Also, their customer support is top of the line too. Ismail Pathan, a manager with the company, has always been extremely helpful.
If you want your life to be easier when finding property info, I highly recommend Reonomy.