I recommend them.

Sheppard Air works great. I got my ATP and Mil Comp Instructor. As long as you don't mind memorizing questions and answers, you will get a great score. If you are hoping to "learn" something, then you will be disappointed. Hopefully you are just wanting to pass the test, which you will.....

Agree with all above. Used the Sheppard Air SW and instructions for the MCI. Studied two weekends and basically maxed the 3 hour test in 1 hour. If Sheppard Air has a test prep I would use it. Happy to see that they now have the ATP. As far as I'm concerned they are the best out there.

Sheppard software worked great for my ATP written as well. Some information will stick with you and many questions were similar in concept to the Delta tech test I've seen online

recommend. passed the written on them alone. could have gotten my money back based on the score, but I was being impatient and took it early.

Excellent test prep for ATP.

I highly recommend. I've used it for every written from Instrument all the way through all CFI's - currently using it for my ATP over Allatps prep

I'll also chime in. I started studying for the atp 121 written last Sunday. I studied for a few hours everyday while at work and took the written yesterday. I got 85% and knocked it out during a sit while the client was at a meeting at the FBO. Finished the test in about 45 minutes from sign in to sign out. If I would have spent a few more days no issued getting over 90.

Positive side to that diamnd is you get your money back...

Actually one better, a note to there great customer service. I signed up for their program in 2012 and let it expire. I called to re up the membership for $40 and they gave it to me for free for 45 days. Only needed a fraction of that.