For what it’s worth, I have tried dozens of units over the years ever since reading the CFTS back in 2001 trying to emulate the success without spending money, I mean no money! From £5 - £35 even units like the body tech elite (“elite” lol) for £100 with fixed programmes, fixed frequencys and widths the lot
As I said earlier I went only a little more cost £155 with my elite pro 2 bought 4 years ago now, in this time I have used on myself and my athletes (one of whom is now with uka and ran 10.35 under me)
I won’t be changing that’s for sure, the contractions are full and strong without that feeling of electrocution I was getting with other cheaper models.