Used to fly IAH-LIM a lot.....

No crew seat blocked as we fly it in 5.5 hours, never seen any restrictions as far as weight. There can be a lot of non-revs out of LIM back to both IAH and EWR and they hold you beyond security/passport control until the last minute. I have taken my wife down with me (she as a non-rev) and its a non issue but something to be aware of.