I like the summary of account/account overview section. You're able to see transactions, previous and repeated ones with ease. It's a secure way of handling your balance and money.
There's nothing that I severely dislike about PayPal. I've never had an issue of security or anything.
I've been able to securely use PayPal for business transactions and expenses. The fact that PayPal is recognized as a viable form of payment is what allows for ease of use on a broad level.