Actually, PayPal, when it first started, many people did have some bad experiences with them. There were THREE class action lawsuits against them. Two cases merged. They aren't a BANK, so they didn't have rules or safeguards the way a bank has with your money. So they used to randomly freeze or close down accounts "suspected" of fraud
and then KEEP the money in those accounts. Often, there was no way to have a legitimate investigation done, resulting in UN-freezing the accounts or having the money go to the rightful account holder. I remember those days. I had a PayPal account closed with some money in it.
Here is a link to the class action lawsuit on SNOPES as verified legitimate and the details. PayPal paid out $9.25 MILLION to settle the suit. (Can you imagine how many
more people they defrauded on top of that amount?) PayPal admitted no wrongdoing in settling the claims.
https://www.snopes.com/fact-check/paypal-class-action-lawsuit/
Since that lawsuit, PayPal has become more legit. However, do NOT leave large sums of money in your account. Again, you never know when they will decide to freeze an account for some reason and "hold" the money and you never get it back.
As of now, as PP stated, PayPal IS good if you are a Buyer. They tend to side with Buyers if there is a dispute. The only downside is that if the Seller makes an error, sends the wrong item or a damaged item, the BUYER has to pay return shipping for the Seller's mistake.
So you end up paying for shipping both ways.
(I tend to buy things with free shipping, so the Seller has to refund the full amount.)
The problems that arise for the Sellers side are Buyers who lie and cheat and say the item is not as listed, is broken, damaged, etc, or they were just sent an empty box, and they get a full refund, (remember PayPal sides with buyers,) and never do send the item back to the Seller, so they can sell it to someone else. So the Seller loses the item and any money they should have rightfully have gotten. The money is held in the Seller's PayPal account for a couple weeks. He can't withdraw it until the time limit for the Buyer to make a claim has expired. If the Buyer does file a claim and wins, it's bye! bye! money from the Seller's account and goes back to the Buyer. If there is no claim filed, then it is released to the Seller.