My buddy Jake is a season ticket holder for section 342, row 10 and I have sat here on numerous occasions with him most recently for a Cowboys - Seattle Seahawks game in 2011.
These ARE NOT club seats; 342 was just another mezzanine section.
342 has wide rows with maybe 20+ seats in each row. There are cup holders in each seat which is great because I have been to a few NFL stadiums with no cup holders in the seats.
Rows 11-17 are practically fourth level seats, they sit much higher up.

I think you'll find the fan atmosphere to be a little tame. For a stadium that holds this many people and is closed in, the crowd noise never gets to the deafening levels that you'll find at Lincoln Financial Field o CenturyLink Field in Seattle.