Reading a carbon copy of FA is very effective. You can mark right there in it, you can see number of pages and literally feel it in your hand how much you have left. It motivates. What's most important is that after you have read it once - you'll appreciate the order of topics in it - they are in exact order you want to learn. Starting from Biochem and ending with organ systems. Each organ system has it's own anatomy, physio, pathology and pharm following each other in a very precise order and you really tie things together as you read each section. One builds on another. This is precisely why I abandoned Anki altogether. It seemed just like a bunch of random questions put together with poor explanations (remember that it's often important to read what comes before and what comes right after specific bit of knowledge. In FA it's right there - you can see it and follow easily - quickly check the paragraph or page before and after. In Anki - it's often a random facts and questions.
Also, as it was mentioned - once you actually start reading FA you can go through it relatively quickly - within a month or so. I can hardly imagine anyone doing 15-20k deck in 1 month of time.
FA is best there is - why would you want to not use it and instead use a secondary tool built on FA with lots of omissions, mistakes, limitations like inability to see a full page or even section at once in front of you, wrong order of facts to learn etc. I only used Anki for Pharm, but even then - Sketchy was a better resource for that (as well as for micro).
