D P.

I've been a member of VC for a few years, have bought and sold items. I want to love this website, but simply cannot.
As a buyer I have received blatantly fake items (like "graffiti" done with a Sharpie marker) that had been "authenticated" and approved. It was so fake that I didn't even need to take the item out of the packaging to see it's fake. I sent the item back for a second opinion and they reimbursed me, but I had expected some form of apology, since they failed to do the one single thing the community asks of them and pays them for - to check whether the item is authentic.
The problem boils down to this - the buyer has to independently be able to tell whether the item is authentic or not, otherwise VC will not help you. This is possible if the buyer knows the brand well, if the item is (still) available in stores and can be compared with the received purchase or (maybe) if it's a limited edition which would be difficult/expensive to copy. Otherwise, if you are shopping for a classic Chanel bag, let's say in black caviar leather, there are more chances than not that you'll be buying a fake. Hence the higher the price, the more risk you are taking on as a buyer.
And last point - VC only checks the items once they are sold and in their facilities. Some of the items on sale are so fake, that one can even tell from the photos posted. Not to mention Hermes/Chanel/etc items posted at 2-5% of their store value. VC doesn't not block these items, does not block sellers.

In short, VC is becoming eBay.

SWISS is simply more interested in short-term revenue and doesn't care about providing the actual service.

My tickets are non-refundable, but most companies are currently somewhat flexible due to COVID. In the case of SWISS there are no refunds (fine, understandable), no vouchers, no change of destination, only change of dates. The latter service is provided for a fee (40chf/person) and at a hiked up rate of the new ticket.

If you have any challenges on their website, they will ask you to contact their call center. On their international webpage this is a number in Italy, which will make you wait 45min, then answer in Italian and then put you on mute. At this point you are technically "talking" to a representative, but the representative is ignoring you.
If you manage to find the Swiss number, you will have to do some research, then you will be on hold for 1h15.
If you contract then by email, you might get another Swiss number, in which case you'll wait about 15-20min on hold. The representative cannot do anything, you will be referred to their website. When you explain that your voucher isn't working on the website and that technical support told you to call them, you will be ignored and then put on hold. Indefinitely.

It's tempting to buy a flight ticket from SWISS since their prices are competitive, but if you have any problem with your flight, COVID or not, you will simply lose that money.