I do not know the car but would advise to ask for the applied model number firstly which in conjunction with VIN would confirm / deny if this is STI. The rebuild, if supported by receipts, was done with proper parts but does not mention crank was replaced and in majority of bottom end failures crank also needs replacing. I would also question the mentioned remap, V4 STI ECU is not mappable and the add does not mention aftermarket ECU which would allow for a remap. V4 STI should boost @ 1.1 bar stock afaik.
Best of luck,
Lukas