The main problem is that the customer is required to assemble their own lights via a ridiculous system which inevitably causes damage and disintegration. I had to extend every slit in each ball with a Stanley knife in order to get the LEDs inside. This fiddly and annoying process led to the damage of at least 10 out of the 50 I ordered. The strength of the balls also varied significantly from colour to colour. In my case - the dusty blue choices were much more flimsy and flexible than the other two colours (grey & green). Charging an extra fiver for a mains plug is scandalous - who plugs their Xmas lights in via USB? I was going to write and complain, and to request some replacements, but decided life is too short - I have more important things to do. Alan Wilder