It's always tricky testing recovery programs, especially those that work with optical discs - there's no way of saying definitively that it can do all it says. We can report, however, that CDRoller worked with several test CDs/DVDs that we keep around for these reviews. The test discs won't load, but they can be read at a low level.
Fortunately, you don't have to pay for CDRoller to find out if it works. Simply download the demo and see if it finds the data you're trying to recover. If it does, pay the $30 and save your data (assuming it's worth $30 to you, of course). The program also erases and writes CD/DVD/BD discs, as well as reads and burns ISO images.
If you have a decent amount of computer knowledge, CDRoller couldn't be easier to use. The company might consider putting a one-button (Recover) interface on for neophytes, but most users will be just fine with all the options and info arranged neatly on the main screen.
CDRoller is a no-brainer. Download it, see if it works, if it doesn't (many discs simply can't be recovered) then don't pay a penny.