Being new to electro stimulation, I found this to be a much better power box than others on the market. The one thing that really got me is the fact it has knobs for adjusting the strength and intensity. This is in my opinion very important as you can adjust better and much easier than other brands with buttons to push for up an down. I love Squeeze, Milk and torment the best. Having two channels allows me to use an insertable and the rubber loops at same time. Very pleased with this and no regrets.