I went back to the old craftworld Eldar and had a go at painting some Swooping Hawks. My eventual plan is to have a (small) squad of all of the Eldar aspects in the first Eldar codex, with the exception of the Shining Spears, who didn't have models back then.
The Swooping Hawks were lightly-armoured troops who used their jetpacks to fly above the enemy and drop grenades on them, to deadly effect. In theory. In actuality, they were very hard to use, as their attacks were very specific and their armour was tissue-thin. Back then (and probably now) much of Warhammer 40,000 was about covering your men in armour, and the Swooping Hawks tended to die very quickly.
Also, as I discovered recently, the models are top-heavy and fall over all the time. That said, they're also Jes Goodwin sculpts and are excellent miniatures with a remarkable amount of motion for their time. I put mine on slotta-bases, and made some grass and ruined pavements for them to stand on.
I don't think I've made a bad job, but I did find them fiddly and not all that satisfying. Still, I'm glad the unit is done, even though - if I actually played 40k - I'd never use them in battle.