I have used the zapperplans zapper for two years and I still say there's not much use for any other kind (unless you want to support Huld Clark in her research, but I suggest you buy her book to support her research http://sbherbalremedies.com/books/the_cure_for_all_diseases.html and buy a zapper at zapperplans http://zapperplans.com/ to support their cause, an affordable zapper for the people who only need to get well and don't have money to buy an expensive one.) I am very happy with the size and have been able to zap any where I want as it is not such a bulky nusance :)