I trained myself on them, they are all pretty easy to use. The trend I see with insurance companies, in the last year or so, is that they want people to use Availity and Navinet, or their companies websites for verification of benefits, eligibility, and claim status. So therefore, the info offered on the sites is much better and accurate then it used to be. It is getting to the point with some companies where that is the only way to check claim status, for instance.
Another option is if the billing software you use offers benefit verification for an additional fee. I use that option with some of my remote work.