I’ve found snaprevise useful for the topics I don’t understand. I also have tailored tutors. Tailored tutors is more concise and focuses on the exam techniques. If you want a concise video with exam technique and how to answer exam questions go to tailored tutors. If you just don’t get what the topic is about go to snaprevise and then follow up with the tailored tutors. I’m very lucky and don’t have to pay for my resources myself and I appreciate many others aren’t in my position. Before I got snaprevise and tailored tutors I had an account on KhanAcademy which is free but I found it a bit confusing because it wasn’t clear on where the video fit the spec. I also have a revision guide which concise notes on for biology which is good for scanning before an exam. Personally, I do loads of past papers then use the videos to touch up on the stuff I did badly on. A-levels are all about getting the balance right. I wouldn’t necessarily say snaprevise is bad but I wouldn’t use it as my main resource.