This is a very average venue. Aside from the obviously overpriced food and drink, the sound is really lackluster. More often than not you'll find yourself listening to a giant blend of noise, unable to really focus in on any one instrument. On the plus side, it is very easy to move down the seats from the lawn without anybody noticing or caring, so you can get a slightly better experience.
A word of warning; the security guards are serious power trippers. You can be walking away from the beer stand after clearly showing your ID and they will card you a second time, asking multiple questions and staring at your face for 20 seconds. Why? I really don't know, they probably just wish they hadn't screwed around in life and want to flex any and all authority they have.
Would definitely prefer a smaller venue, but given how cheap the tickets usually are here it's worth it for the most part. You just need to be aware of the potential bullshit you'll encounter.