Best thing about section 330 is that it doesn't sit high up in the skies at all. Every seat at Lambeau is on the main level with the exception of the 6,000 new seats they just added to the upper south end zone.
We sat in row 11, the 2nd to last row, for the Packers-Arizona Cardinals game in 2012. Had a blast at the game and the view was one of the best in the stadium in a stadium where there really isn't a bad seat for viewing. The sight lines are very "central" in 330.
Just remember that these aren't club seats so you'll still be sitting on metal bleachers instead of normal seats like at Miller Park. If you want your seat to have a back, you'll have to rent one of those portable seats near the entrances. They cost $6 and you'll just drop it off as you exit the stadium. They often sell out so make sure you get to the stadium in plenty of time if you want one.
Not far from our seats was a stand called 'Gridiron Grill' and they serve cheese curds, bratwurst, chili cheese dogs. The food prices are lower at Lambeau than other NFL stadiums I've visited but still higher than what they should be. I think the beer prices are so high to discourage and deter excessive drinking that often accompany football games.

The stadium is completely enclosed so you won't get a view of the exterior area around Lambeau. Not that there is a lot to look at anyway; Lambeau is the tallest structure in the city.
The Packers Pro Shop is near the Miller Lite/Atrium gate and it takes up two levels. All of the jerseys and items are expensive so I would recommend buying online before you come. The Airport's gift shops also have a huge selection of Packers items as well.

If you call yourself a Packers fan, you won't go another season without visiting Lambeau to see it for yourself. A tour or visit to the Packers Hall of Fame on a non game day would do it no justice.

20 yard line behind the Packers sideline? Yes, please. This is the reatest stadium in the NFL. The Fans are great, not saying that because I'm a Packers fan myself. I've seen 5 games total at Lambeau Field, and I'm impressed every time with how the crowd treats fans that root for the away team. The last time I was there the fans shouted down a drunk Packers fan who was being obnoxious to a Bears fan. How cool is that?

There isn't one section I would recommend at Lambeau; they're all great. I had these seats for a Broncos game, row 5. My only gripe is the bleacher seating and I think that's the only gripe that you'll hear from most Packers fans but if you look at the season ticket waiting list, it must not bother them too much. : )