Well I got an A in it without too much stress but it's quite hard to get the A*--the multiple choice examination is really easy but the written exam is marked harshly and accounts for 65% of your grade.
The past papers are available in the teacher resources section if you have a LibF account and there are multiple choice tests on the website for each topic of each unit. There aren't very many though and you should be wary that some of the older written papers may have a different format to the current ones (ie no distinct case study/non case study section). The case studies also change every year (although generally case studies based on a similar stage of the personal lifecycle are similar). The answers in the old papers might also be out of date as financial limits change every year, so tax calculated based on today's rates would be different to previous years.
Honestly I don't think the qualification has much point with regards to universities not caring about it, in particular if you're taking 4 A-Levels. But it should be fairly easy to get at least a respectable B or above because you can resit all exams for free and you get the higher of your two attempts counted toward your final grade.