Hopefully one day I can add some more info about the PiperJet, but right now they are working on type-conforming test-beds, so maybe near future. I personally have only flown an SR22 twice, nice plane, but the way it's marketed and who it attracts are what scare me. Also, FL250 ceiling.....that sucks for a jet, might as well get in the Meridian/TBM and still go higher.
All of them have had issues making their projected delivery date. I don't know what's going on at Honda, but they've got a tight lid on things. Not sure how that plane will appeal to the market regardless of performance because of how it looks. Either you like it, or hate it.