I have their 1/72 F-15EX and I admit to being a bit disappointed. The don't depict the added wing stores stations at all and that's one of the major changes.
Addendum: The added wing stores stations can be obtained, including suitable bottom portions of the wing, from their first F-15E Strike Eagle kit, #E10. Amusingly, that kit has two different color schemes flown on the TF2 demonstrator, 71-291, but the kit has the production airbrake, not the small one fitted to the prototypes.