For several months I use the AT340 for my head and I am very satisfied. The price was great at Amazon so i dark. Certainly, unpacking, it took me some time to identify all the accessories and it amused my early fantasies create entries for my dear little darlings. Certainly after Blissey, it is time to take stock. Does he doing his job? Yes, definitely. He does it pretty well even. Before, I rĂ¢pais everything by hand. Now I think all the same whether or not the head jOperation all depends on the quantity. If this is for two three cores, the hand is sufficient Otherwise, this is left for installation. A very easy installation dailleurs. I havent had any problems (maybe a little lock but being careful, it goes smoothly). And everything is still solid. But i doubt on accessories too plastic. Jai fear of breakage every time. Things are heating little or not at all: my needs remain very limited. How much faster still: everything is faster.