I just started using Rife around 6 weeks ago after treating with herbs and essential oils for a couple years. So far I've only used the Borrelia frequencies but it is really effective I must say. Just a few minutes of use is able to trigger a stronger herx than anything I've tried so far (with the caveat that I haven't used antibiotics). One of my major symptoms has improved a lot too since starting.
Rife in general is such a strange concept I can understand wanting to try a machine out before jumping in. Someone let me try their GB4000 which is what sold me. The one thing I wanted to mention is that the price of a good machine has gone down dramatically recently, from $1000-$2000 down to a couple hundred. The machine I ended up buying can be had for around $150 which is pretty cheap. It's primarily software based so its like an innovation in the Rife world, just came out a couple years ago. Check out
www.spooky2.com/. In general Rife tends to be pretty DIY so it pays to invest in getting a machine I think.