I don’t typically post in message boards but found I really appreciated reading the experience of others as I was working though my own testing so wanted to return the favor, for whatever it might be worth.
I used Achievable for the SIE and passed in the first attempt so I had no reluctance to engage with them for the S7.
My study report looks something like this:
According to the dashboard I have 114 hours of study in Achievable, although when calculating the extra time spent with note taking and watching other material I would guess my study alpha is probably about 1.5 
I had some unexpected travel in the middle of my study so I had to start back up in the middle of the material, which caused me to have to reread some things to get caught back up.
I read all of the material. I took all of the practice quizzes. I took all of the full length exams at the end and took 10 full length practice exams, scoring 87, 89, 82, 92, 86, 86, 84, 80, 82, 89.
I reviewed my missed questions after each practice test and spent some time quizzing/reading certain topics I wasn’t doing well with. I average about 2.5 hours for each of the practice tests.
I used Achievable exclusively for my study program but did watch some YouTube videos (Series 7 Guru) just to hear the material delivered in a different way.
As everyone says, the test questions on the actual exam are different, so I was prepared for that. I saw a good number of questions on options and found those to be the easiest since they have a solid right answer. If you know your options and how they are used those questions are confidence boosters in the middle of the exam. Some of the suitability questions were more difficult to pin down.
I felt like I was grasping a little bit during the exam but read each question carefully and leaned into the material that I knew was in my brain somewhere.
The exam took me over three hours (longer than I anticipated based on my practice tests) but I was purposefully being more careful and went through about 25 flagged questions with the extra time I had.
The team at Achievable is Top Class. I’m so impressed with their level of customer service and quick response to every question I had (seriously guys, nobody expects an answer on these random test questions on a weekend afternoon!!).
I’ll be diving into the 66 next week.
Good luck everyone!