Great tool. Granted I have not tried some of the more complex stuff, but it is really useful in running long range searches Vs ANA.
One comment, you might want to update the tips page to indicate that AC and CO show availability that is not open to general *A programs. For example I can find 3x C seats from NYC to SCL/EZE in both AC and CO. But this appears to be extra inventory that is not open to other *A programs.
Must say the past searches feature is very useful as is the route building (bearing in mind it is not exhaustive, and the experienced FT'er may be able to find other options).