I bought a new Braun stick blender as my old blue and white model (type 4193/400watt) was on its last legs after over 20 years of use in the kitchen. I looked at several brands however decided on the Braun mainly because I was very happy with the performance of my old Braun. I reviewed several Braun models however settled on the MQ5137BK mainly because of its power, stainless steel shaft and the size of the mixing/chopping bowl accessory (matching my old unit) which is ideal for making hummus and crushing/chopping nuts. The mixing bowl in the next model up is too small and includes a food processor which I didn't need. The unit is much quieter to run compared to the old model and performs very well blending soups and making smoothies.