Go for it, Jae. I've been using PayPal for years and years, and it saves so much hassle - eBay, Amazon, John Lewis, accommodation bookings, they all take it. You place the order, enter your PayPal password when prompted, and the seller gets their money without knowing anything about your banking details.
The only thing to watch for is when your card expires (after 4 years or so) and is replaced. Then you have to log into PayPal and update the card details, but at no other time.