Hi, new users often get confused about Credit and Goodybags.
Goodybags are better value than Credit (Pay As You Go) if you use your phone a lot.
All Goodybags have unlimited minutes and texts. The price depends on how much data you want. Goodybags last only one month, so you have to buy another each month.
However, Credit (PAYG) stays on your phone from month to month until it is used up. But the cost of calls, texts and data is much higher when using Credit.
Consequently, if you use your phone a lot, Goodybags are the best option. But if you don't use your phone much, Credit might be better for you.
Also, managing your account is easy if you download the giffgaff App to your phone.
I hope the above helps.