Im very happy with this app, the features it provides, and its overall functionality. Its easy to use, informative, and I love that all the information from the guides has been compiled. Its very intuitive, things are where you think they should be, and I LOVE the timer. (I was having to set an annoying timer on my phone before the app came out, but the app even has a "pause" button you can hit if you need a short break). There are a few options I wish it had, which is why I give it four stars instead of five. One) I wish the meal plan was an option to include. Kaylas nutrition plan is a little too varied for my taste and I dont like cooking more than once or twice a week. I use her app for meal ideas, but I already have her guides for that, so it seems a little needlessly expensive to pay for the meal plan when I dont necessarily use it. Two) I wish I could see the exercises from the resistance workouts Ive yet to complete AFTER Ive already done a resistance workout that day. I like to mentally prepare myself for the next day while Im in bed, but once youve done a resistance workout, you cant see whats in the next ones until the next day. I assume this is to prevent burnout or injury from over working yourself, but it would be nice to at least be able to see what was coming next if you dont always space your workouts two days apart. 3) There seems to be a little issue with the cardio section. Ive hit week 9 now, which is when HIIT and LISS should both be an option, but the cardio screen keeps switching from "cardio: three remaining this week" and showing LISS as the only option, to "cardio: four remaining this week" and showing HIIT and LISS. This morning at the gym when I wanted to HITT, I didnt have the option of selecting it, even after restarting the app, restarting my phone, and deleting the app and reinstalling it. So overall, this app incorporates Kaylas awesome program, which has helped me get stronger and leaner than I have been in YEARS, pretty well. Id absolutely recommend it to anyone who has her guides or who hasnt seen them before. Yay Kayla!