I have several piano whisks at home. The reason is because I went through a few products until I finally found one that I really like.
The biggest issue with this type of whisk is that it can take a long time to get the desired effect and it can be very difficult to clean. The whisk I use now is a very sturdy ten inch piano whisk with lightweight steel loops that make more froth in a shorter period of time. It also has a nice big handle so it has a comfortable hold and is easy to clean as well. I did waste some money on the previous whisks I tried but I've finally found a winner. I think I will be using it for many years to come. I use it almost everyday for things like omelets, pancake batter, sauce, custard, etc.