I bought 2 machines in the same order. I asked for 1x 1200W and 1x 1580W. But that was apparently not possible and I got 2x 1580W. The polishers give a unpleasant shock (kick back) at the start up. But the most disadvantage is the high rotation speed at the lowest level. Both machines are identical in their perfoming. At level 1 it should be 500rpm according to the product description. That low speed was the reason I've bought two machines. But it turned out that 500rpm is definitely not the case. Both machines have a speed of at least 1300 rpm at their lowest level. The polishers do function, but don't expect too much from it. Very fast shipping from the Czech Republic.