Very easy to install and they feel really sturdy. Im a dancer, and used to wearing high heels alot but these heels could not be more uncomfortable. They are cute but not a high quality product. Der Sound ist - typisch Sennheiser - unschlagbar. I could have purchased a whole set from one seller, but most did not have all the pieces I liked and it was better for me to buy from different sellers. Traumhaft. And different between reef designs them selves. Really neat and the speaker has a nice sound quality and volume. Sound quality wasnt any better than a set less than half the price and the neck cord was all tangled and wouldnt straighten out. Make sure that you install the coat rack hooks first before doing anything else.