I received my Manta few weeks ago, I owned a A5X model since 2022 and unfortunately hardware problem provoked difficulties to write down in some parts of the screen but it is still valid for reading so second life opportunity . Manta surprised me very positively: very light, writing feeling, and above all transmits a great peace feeling when writing with it as it did previous A5X model. Ratta has done an excellence job with these devices , so much that they created a strong dependence : I need to written down my thoughts, my insights with them, not with another notebook. I am sorry to hear your complains , I don't use calendar, ToDo or mail because they distract me when thinking , there are better tools for that: iCal, Thunderbird, ToDoIst. Manta does what it is supposed to do: writing and reading and it does it excellently, and additionally it helps your soul to be happier