Sheppard Air is the way to go.

It doesn't matter which written you take when it comes time for the rating, and Sheppard Air makes the studying much easier. The FAR's are really the only difference between the two (the aircraft types for the problems also, but that doesn't really matter). SA has a study sheet teaches you how to do all the perfromance, cross country, HSI, etc in seconds not hours!

They also have narrowed the test bank down so you don't have to study as many questions. You also get a money back promise, and if you see a question(s) you didn't have in the studying on the test.....remember it and send it to them. They will usually give you your money back for that also! (It's how they keep things current!)

I can't say it enough, SA is the way to go! (Cheaper than most other options by quite a bit too!)