Thanks so much for your responses.
We’ll have 5 hours in Houston so regardless whether or not IAH participates in the ITI program, we should have plenty of time to confirm our luggage makes the connection to Munich.
We do not have EU passports. Our connection time in Munich is 1 hr 50 minutes which is cutting it close. With any luck it should work out ok. Flight Aware says the average delay of the Houston-Munich flight is less than 10 minutes.
How is customs at BLQ? Our plan is to have 2 checked bags, 2 carryons and 2 backpacks with us with no alcohol, no tobaccos and only clothes and the usual accessories (iPhone, chargers, kindle and toiletries). We are on the B2B Transatlantic