I have used the HMEC 100 in cessnas and even in an Islander and found it very good. Not so in the noisy Islander but perfectly adequate in a single. The only problem I came across was that the headset band has metal fatigue issues but can be crossed with a peltor headband if you can source a spare one. The ANR versions by senheisser are excellent but expensive and in a 172/PA28 the passive headsets are just fine.