[Filament]

Philips is ridiculously easy.
I heard Tile is easy.
JBL I was able to just tell them I sent the package back and they sent out replacement without asking for tracking number or anything. This was years ago though.
Food is easy.

What exactly do you mean with "ridiculously easy" will they just send a replacement right away when I say for example my philips speakers don't turn on anymore?
Also what do you do when they ask for an invoice? You just send them a fake amazon invoice?

Correct, for Philips, they'll ask you to troubleshoot, then for POP and serial number. Afterwards, they'll just send out a replacement. I just did them last week so I can confirm it's still easy-peasy.
I just did Dell for their S2716DG monitor. It was also super easy. They just asked for serial number and date of purchase. They do advanced replacements so you'll have to use a drop. They didn't ask for any card info or anything.

I usually create my invoices from Best Buy via Inspect Element. I used to use Amazon and it has worked splendidly but some companies check the order number.