Before I got my filofax in the middle of 2012, I had wanted one for ages. I get easily stressed and having something which lays out all my plans and appointments etc. makes me feel a lot more organised. I genuinely do not know where I would be without it; I take it everywhere with me, and pretty much write down everything I have on in there. I also really like using it for a record of everything I have done, as I keep all my old pages! It's really nice to look over the summer pages and see all the lovely things I got to do, as well as all my lectures and placement days over the last term!
I bought mine for £25.00 at WhSmiths and then bought some refills i.e. 'To Do' pages, more address book pages etc, but they are currently reduced on the filofax website to £17.50. I got the 'apex' pocket size, which is the medium one, and it is perfect for me; it is small enough to fit in my bag but not too small to fit anything in it. However, there are so many options in style and size that you are almost certain to find something you will like!
Although they are quite expensive compared to a normal annual diary, I think they are so beautiful and although you do have to pay for refills every year, I'm so glad I bought mine and have definitely got my money's worth out of it. I've never felt so organised, and 6 months on from buying it I still it use it every day.