shadowgun
I am currently using Math Revolution. I like the content and especially how it's structured. The one MAJOR DOWNSIDE is their website, which resembles like what I created when I first learnt html in high school and there is something wrong with the way their database is set up. The videos take ~30 seconds to load if you're using an Ipad. And when on a laptop, the videos will for some reason pause to load in intervals - reminds me of days when I used to watch movies from bootleg websites. and btw I do have a pretty fast internet connection.
In all honesty, the content is good! The content delivery (tech) is pathetic which is very frustrating! esp when you are trying to prep. Overall, I give Math Revolution a mere 1 out of 5! and primarily because their videos have way too much lag, and you cannot study esp. if you like to pause videos and solve the question in parallel. not gonna work! you will just end up getting frustrated and angry.
Thank you very much for your comment

I'm taking their trial version. It looked good at first but soon I found it's hard to remember all of those rules about tricks

I'm not able to access all the course so it's hard to give an exhaustive review.
Thank you any way. ^_^