Had the pleasure of sitting club at an Indians/Oakland Athletics game during the 2012 season. Our boss decided to hand out some tickets for the game which was great, so I didn't pay a dime for these seats.
Section 348 is the most coveted private section at Progressive Field since it's the closest to home plate and also right next to the press box. Despite being labeled "300", the club seats are still on the second tier of seats. The seats we had are the most comfortable at Progressive and are also wider than the seats found elsewhere in the ballpark.
The second level is prime for viewing every infield hit; when there was a play made at first base, we could the batter's thrown out really well from these seats.
The best feature is obviously, the free food and beverages. Alcohol IS NOT included but there will be no waiting in line to get it. The bar/lounge areas are super nice and have a great selection of beers, they even carried my local favorite: Great Lakes. There were also plenty of tvs in the lounge which is ideal during the season if there is a Cavs, Ohio state or Browns game going on while you're at the ballpark.