I tried Sporty's too. They're good, but I just couldn't get into their course. I have nothing bad to say about their content or their courses. I know others that have had great success with them.Surprised not too many Sporty's votes here. I like their content - seems more up to date. Kings, while good too, just feels like it was recorded years ago.
I used King Schools 3 years ago and passed 95%. Earlier this year I used Sportys and passed 93%. King Schools course is more fun, John's a riot, but it basically teaches the test. Sportys is more comprehensive, not just teaching the test but also providing useful, interesting lessons regarding actual flying techniques. Either way, the online sectional charts are difficult to use, so an FAA Chart Supplement helps with either one.