We've had two Zodiacs 2.something and a 3.something both hypalon with airdeck floors. They are certainly better than the old rigid wooden or aluminium panel floors, but the reports of 'rippling' or 'trembling' when planing under speed is quite true.
You've got to jump from an airdeck to a solid floor to feel the difference and of course - one feels nothing at slower speeds.
We replaced our 3m last year with their latest 3m plastic RIB - it has a folding solid transom - and no rippling / trembling. This RIB does ride fastest and smoother using same 8 hp engine, and interestingly is only a fraction heavier. Sue and I can certainly lift
the combo dink and engine up the beach when neccessary.
Oh - it costs around the same or less that the airdeck in Europe
- but is made under the Bombard brand name as opposed to Zodiac
It does pack flat but obviously cannot roll like the airdeck - but FWIW we do find it far far superior in use.
Maybe worth checking one out.