Never once had an issue. In fact they have fought battles for me and won. BE WARNED there are so many scammers out there that try and get your paypal info theyy will send emails that look so legit that you are tempted to look. Believe me DON'T! They have your vitals and if they want to get in touch they will by doing so in a legaland lehit manner..... Not email.
Scams saying that there has been a double payment get you to "Verify" your account info by "Logging in" to confirm, Scams saying that there has been some suspicious activity on your account, a frausulent withdrawl, etc etc.
Trust me when I say that they will do anything to scam a PayPal subscriber as it is the most sought after digital money transfer company in th eworld.
ANY email that has a link in it from "Paypal" and I quote that because of fake sites that look legit, You simply HOVER your mouse pointer on the link WTHOUT clicking. Take a look where the address is leading you to and if it is anything other than https:// then you can bet the farm it is not legit.
On a buisness sense it is the smart way to open new venues as they have a great invoicing system, records, and other really nice buisness savy ways to conduct transactions.