I use the Sony in-ear jobbies which work fine. Sat in A1 with FR NYO-STN they reduced a howling door seal to a muted shhhhh and since I started wearing them long haul they actually help me get some kip (Not when in Y though: the seats ensure no such luck)
The only drawback is being tuned for lower frequencies they still let howling babies through loud & clear.
[Edit] Make that two drawbacks; the other is nine miles of cable thanks to the sound processor gubbins necessarily being a separate box as indicated above.
I still wear them and still like them though.