Just wondering about whether to buy or rent a tens machine, for my first baby i hired one and found it great. To buy a boots own brand one is about 55 euro (i'm in ireland!) and to hire a mama tens is 35 euro, so wondering is it better to hire a more expensive one, is there a difference in how the more expensive ones work? The last time I think I hired one called Pulsar. i'm afraid if i buy the cheaper boots one it might not work as well TIA!!