I don't feel qualified to offer a proper review, but will make a few comments about this tool:

1. Some airlines, particularly CX and IB, show no more than a couple of months of their schedules, so long range planning with this tool is difficult.

2. The option which shows all flights from A to B is great, but includes non-stop flights only, which can be very confusing, particularly for a OWE planner looking for direct flights with one stop or more.

3. It is buggy, and the authors show no inclination to fix it. Take good care when working with the calendar, which is lousy.

4. You can update it weekly if you want, but it takes some time with a slow connection, because it downloads everything again (and leaves the old stuff on your disk, for you to clean up).

5. Be careful with the code-shares, because the tool shows all of them, even the ones operated by non-OW carriers.