I've been using one for about 3 weeks. I really think it is making a difference. At this point, I feel much better the day I do the cleanse but it does not last. More energy, less weakness and pain. I am getting a ton of heavy metal out of my body which I hear really makes our Lyme symptoms worse.
I got my footbath from a web auction site. The cost can go from about $200 to $5,000 depending on what you get. Spas use them so they get the industrial $5,000 ones. For home use, you really should not have to pay more than $350. They usually come with a heat waist belt for 'melting off the lbs' and sometimes other treatments built in. Some have MP3 built in too. Some come with the foot container, some do not. The arrays you put in the water run about $40 and need to be replaced after about 80 baths. My cleanse came with 2 arrays. Some come with different number of arrays.
Good luck and be well!