My 15 year old Sennheisers are capable of producing the top-end frequency range of these Beyers but the Sennheisers do not sound as bright (and another term I might use would be brash) in those upper ranges. The fact that it has a short height means I cannot rest my palm on the mouse and it is up to my wrist to support my hand to suspend over the mouse. Meine anderen Trainer waren jeweils betriebsbereit out of the box. But 4 months, really? They were only ever worn inside the house. Basically a well thought out, high performing product. I put a straight bar from another piece of equipment in the top! Definitely a fun activity to do with my daughter however the travel case can be a bit of a mess. We have tried other shoes for her as a new walker, and even Stride Rites (which was our go to brand with our son) rubbed and gave her raw spots on her ankles. Despite the HORRIBLE customer service I had with OnCloud, their shoes are top notch. There is a lot cushion on the heel which is great for me because I step heavy on my heel when I walk.