Are those the free ones they advertise? The general consensus (even since 2010 when i did my VCE) is that they're a waste of time. They're just a lot of general tips, some are alright but its nothing that a dedicated VCE student doesn't already know or couldn't find on their own. It's more stuff like highlighting tricks for making notes or what to highlight, its really small tips like that. There is no magical formula so i don't know what people go in there expecting..
Genji really hits the nail on the head here. Unless its subject specific, you'll just get a lot of gimmicky tricks. At the end of the day, you can have all the tricks you like but all that really matters is whether you put the work in or not. Their exam revision ones for a donation are actually pretty decent imo and i think you do get notes (?).