I`ve got Laddatec Limpets and highly recommend them,i just googled them to see if they were still for sale and find i am on the testimonial page back in july 07,heres what i said then,
"Cleaning windows i use them daily,once you have used these its hard to imagine why anyone would climb a ladder without them,the customers are impressed too and they project a professional image,10/10 they are as good as is claimed"
Yes i paid full price,do they slow you down a bit-YES,but you just can`t put a price on safety. Downside is you feel you always need them ,its like you feel naked without them.