I've heard good things about the GB4000 and how easy it is to operate. For those that can afford one I certainly recommend it.

As far as the free Rife programs for PC, they don't have a lot of features. Such as sweeps, wobble, the ability to click on almost any condition (in the menu) and choose from mulitple frequency sets and run them.

Not everyone that can't afford the best equipment is pennyless. A high end Rife program such as Frex is a great alternative and very affordable. And the frequency sets are extremely configurable on the fly.

I always ask people what their budget is and then recommend the best Rife equipment they can afford. The GB4000 is definately high on the list (as is a good EMEM device).