I've been using one for almost a year now! I use notability mainly! I take screenshots of questions I miss and I have a document dedicated as my WAJ. Also, when I complete a particularly difficult logic game, I make an answer key basically that I can refer to when I attempt the logic game at a later date. Just practice using paper and pencil every now and then and you should be good to go for test day, didn't really cause me any problems when I took the October Flex.