You loose the right to change your mind and return the goods without any reason given, but of course you still have warranty of 6 months; if anything breaks with the product in that time, you can request the seller to make up by offering a repair, replacement, or refund (whatever they deem most appropriate), and while the seller can contest that, they are obliged to prove it’s your fault, not theirs. After that timeframe, this obligation reverses.

How easy is it to enforce that warranty?