I booked a *A award in First (I) on UA 737 from SFO to IAH, Business (I) class on LH A380 from IAH to FRA, and also in Business (I) class on LH A321 from FRA to ATH. I have a few questions: 1) When I land in IAH, which lounge is better, UA or LH? 2) Since the last flight is only a two-cabin flight, and I am booked in the highest cabin for that flight, will I get access to the First Class lounge in FRA? 3) After landing in FRA, will I have to reclaim my luggage before continuing on to ATH? Thank you!