Saw the Eagles play the Detroit Lions and was in row 19 near the back which are definitely bad seats. (We were positioned above and to the side of the south end zone, towards the corner of the stadium). But anything we missed could be seen on either jumbo tron in the endzones. They plan to build new ones in the upcoming seasons with a series of planned stadium renovations and I hope they're much bigger. Fans will also be able to walk from the east side of the stadium to the west side via a bridge on the upper deck.
One thing I will warn you about is the difficulty for first timers at the Linc to find their seats, particularly on the upper level. There are numerous escalators scattered around the lower level as well as the combination of ramps and stairs. We entered the stadium through the South gate and just took the escalators on the left to the top. The ramps require about 10 minutes of walking due to all of the other fans taking the ramp as well. There could also be a backed up wait for the escalators too.

If you like to tailgate before games, this is one of the best stadiums for it if you don't mind paying more than $20 for parking. The lots behind Citizens Bank Park are really good for tailgating mainly because they are so far away and I guess fans let loose a little more out there. There are virtually no hotels near the stadium with the exception of the Holiday Inn and the Skyview. So unless you're taking the subway, chances are you'll be driving and dealing with the post traffic mess with thousands of other Eagles fans.