Using this along with a PC application and its great. Plus its general, airframe and power plant for ten bucks. If you really wanted to, you could just use this alone and probably pass, but their PC app has a few more features that make it easier. That being said, the PC app is 40 bucks per test as well, so if money is an issue, use this instead.
Joey/Cat about Prepware Aviation Maintenance, v1.34