Plant was safe in their original box and packaging in addition to another box.
Construction was simple. Center, simply plug your left and right of the player, and the antenna cable (because I've wondered about the small end, but it fits). Have also ordered me the module to connect the rear speakers wirelessly - so I did not have to connect to the player but to the module, which then automatically connects to the player via Bluetooth.
Sound I like that, I just need to see how I set everything right. The bass I find something too strong and the rear speakers too low ... but maybe someone has a tip at the right setting for me;)
All in all I think it's a very good system that anyone can build quickly and easily and for relatively little money.